diff --git a/frontend/src/components/FileUploadField.tsx b/frontend/src/components/FileUploadField.tsx
new file mode 100644
index 0000000..36c8f68
--- /dev/null
+++ b/frontend/src/components/FileUploadField.tsx
@@ -0,0 +1,64 @@
+import React from 'react'
+import {Icon, Segment, Header, Button} from 'semantic-ui-react'
+
+import {FileDrop} from 'components'
+
+export default function FileUploadField({onSelect: onSelect_, multiple}) {
+  const labelRef = React.useRef()
+  const [labelRefState, setLabelRefState] = React.useState()
+
+  const onSelect = multiple ? onSelect_ : (files) => onSelect_(files?.[0])
+
+  React.useLayoutEffect(
+    () => {
+      setLabelRefState(labelRef.current)
+    },
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+    [labelRef.current]
+  )
+
+  function onChangeField(e) {
+    if (e.target.files && e.target.files.length) {
+      onSelect(e.target.files)
+    }
+    e.target.value = '' // reset the form field for uploading again
+  }
+
+  return (
+    <>
+      <input
+        type="file"
+        id="upload-field"
+        style={{width: 0, height: 0, position: 'fixed', left: -1000, top: -1000, opacity: 0.001}}
+        multiple={multiple}
+        accept=".csv"
+        onChange={onChangeField}
+      />
+      <label htmlFor="upload-field" ref={labelRef}>
+        {labelRefState && (
+          <FileDrop onDrop={onSelect} frame={labelRefState}>
+            {({draggingOverFrame, draggingOverTarget, onDragOver, onDragLeave, onDrop, onClick}) => (
+              <Segment
+                placeholder
+                {...{onDragOver, onDragLeave, onDrop}}
+                style={{
+                  background: draggingOverTarget || draggingOverFrame ? '#E0E0EE' : null,
+                  transition: 'background 0.2s',
+                }}
+              >
+                <Header icon>
+                  <Icon name="cloud upload" />
+                  Drop file{multiple ? 's' : ''} here or click to select {multiple ? 'them' : 'one'} for upload
+                </Header>
+
+                <Button primary as="span">
+                  Upload file{multiple ? 's' : ''}
+                </Button>
+              </Segment>
+            )}
+          </FileDrop>
+        )}
+      </label>
+    </>
+  )
+}
diff --git a/frontend/src/components/index.js b/frontend/src/components/index.js
index 533d682..638194f 100644
--- a/frontend/src/components/index.js
+++ b/frontend/src/components/index.js
@@ -1,4 +1,5 @@
 export {default as FileDrop} from './FileDrop'
+export {default as FileUploadField} from './FileUploadField'
 export {default as FormattedDate} from './FormattedDate'
 export {default as LoginButton} from './LoginButton'
 export {default as Map} from './Map'
diff --git a/frontend/src/pages/TrackEditor.tsx b/frontend/src/pages/TrackEditor.tsx
index db4dbc9..62e0962 100644
--- a/frontend/src/pages/TrackEditor.tsx
+++ b/frontend/src/pages/TrackEditor.tsx
@@ -1,8 +1,8 @@
 import React from 'react'
 import _ from 'lodash'
 import {connect} from 'react-redux'
-import {Confirm, Grid, Button, Icon, Popup, Form, Ref, TextArea, Checkbox} from 'semantic-ui-react'
-import {useHistory, useParams} from 'react-router-dom'
+import {Divider, Message, Confirm, Grid, Button, Icon, Popup, Form, Ref, TextArea, Checkbox} from 'semantic-ui-react'
+import {useHistory, useParams, Link} from 'react-router-dom'
 import {concat, of, from} from 'rxjs'
 import {pluck, distinctUntilChanged, map, switchMap} from 'rxjs/operators'
 import {useObservable} from 'rxjs-hooks'
@@ -10,9 +10,32 @@ import {findInput} from 'utils'
 import {useForm, Controller} from 'react-hook-form'
 
 import api from 'api'
-import {Page} from 'components'
+import {Page, FileUploadField} from 'components'
 import type {Track} from 'types'
 
+import {FileUploadStatus} from 'pages/UploadPage'
+
+function ReplaceTrackData({slug}) {
+  const [file, setFile] = React.useState(null)
+  const [result, setResult] = React.useState(null)
+  const onComplete = React.useCallback((_id, r) => setResult(r), [setResult])
+
+  return (
+    <>
+      <h2>Replace track data</h2>
+      {!file ? (
+        <FileUploadField onSelect={setFile} />
+      ) : result ? (
+        <Message>
+          Upload complete. <Link to={`/tracks/${slug}`}>Show track</Link>
+        </Message>
+      ) : (
+        <FileUploadStatus {...{file, onComplete, slug}} />
+      )}
+    </>
+  )
+}
+
 const TrackEditor = connect((state) => ({login: state.login}))(function TrackEditor({login}) {
   const [busy, setBusy] = React.useState(false)
   const {register, control, handleSubmit} = useForm()
@@ -75,7 +98,7 @@ const TrackEditor = connect((state) => ({login: state.login}))(function TrackEdi
       <Grid centered relaxed divided>
         <Grid.Row>
           <Grid.Column width={10}>
-            <h2>Edit {track ? (track.title || 'Unnamed track') : 'track'}</h2>
+            <h2>Edit {track ? track.title || 'Unnamed track' : 'track'}</h2>
             <Form loading={loading} key={track?.slug} onSubmit={onSubmit}>
               <Ref innerRef={findInput(register)}>
                 <Form.Input label="Title" name="title" defaultValue={track?.title} style={{fontSize: '120%'}} />
@@ -136,13 +159,19 @@ const TrackEditor = connect((state) => ({login: state.login}))(function TrackEdi
             </Form>
           </Grid.Column>
           <Grid.Column width={6}>
+            <ReplaceTrackData slug={slug} />
+
+          <Divider />
+
             <h2>Danger zone</h2>
             <p>
               You can remove this track from your account and the portal if you like. However, if at any point you have
               published this track, we cannot guarantee that there are no versions of it in the public data repository,
               or any copy thereof.
             </p>
-    <Button color="red" onClick={() => setConfirmDelete(true)}>Delete</Button>
+            <Button color="red" onClick={() => setConfirmDelete(true)}>
+              Delete
+            </Button>
             <Confirm open={confirmDelete} onCancel={() => setConfirmDelete(false)} onConfirm={onDelete} />
           </Grid.Column>
         </Grid.Row>
diff --git a/frontend/src/pages/UploadPage.tsx b/frontend/src/pages/UploadPage.tsx
index 77aab2e..762f665 100644
--- a/frontend/src/pages/UploadPage.tsx
+++ b/frontend/src/pages/UploadPage.tsx
@@ -1,9 +1,9 @@
 import _ from 'lodash'
 import React from 'react'
-import {List, Loader, Table, Icon, Segment, Header, Button} from 'semantic-ui-react'
+import {List, Loader, Table, Icon} from 'semantic-ui-react'
 import {Link} from 'react-router-dom'
 
-import {FileDrop, Page} from 'components'
+import {FileUploadField, Page} from 'components'
 import type {Track} from 'types'
 import api from 'api'
 
@@ -40,14 +40,16 @@ type FileUploadResult =
       errors: Record<string, string>
     }
 
-function FileUploadStatus({
+export function FileUploadStatus({
   id,
   file,
   onComplete,
+  slug,
 }: {
   id: string
   file: File
   onComplete: (result: FileUploadResult) => void
+  slug?: string
 }) {
   const [progress, setProgress] = React.useState(0)
 
@@ -70,7 +72,11 @@ function FileUploadStatus({
       xhr.responseType = 'json'
       xhr.onload = onLoad
       xhr.upload.onprogress = onProgress
-      xhr.open('POST', '/api/tracks')
+      if (slug) {
+        xhr.open('PUT', `/api/tracks/${slug}`)
+      } else {
+        xhr.open('POST', '/api/tracks')
+      }
 
       api.getValidAccessToken().then((accessToken) => {
         xhr.setRequestHeader('Authorization', accessToken)
@@ -85,7 +91,8 @@ function FileUploadStatus({
 
   return (
     <span>
-      <Loader inline size="mini" active /> {progress < 1 ? `Uploading ${(progress * 100).toFixed(0)}%` : 'Processing...'}
+      <Loader inline size="mini" active />{' '}
+      {progress < 1 ? `Uploading ${(progress * 100).toFixed(0)}%` : 'Processing...'}
     </span>
   )
 }
@@ -99,9 +106,6 @@ type FileEntry = {
 }
 
 export default function UploadPage() {
-  const labelRef = React.useRef()
-  const [labelRefState, setLabelRefState] = React.useState()
-
   const [files, setFiles] = React.useState<FileEntry[]>([])
 
   const onCompleteFileUpload = React.useCallback(
@@ -111,14 +115,6 @@ export default function UploadPage() {
     [setFiles]
   )
 
-  React.useLayoutEffect(
-    () => {
-      setLabelRefState(labelRef.current)
-    },
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-    [labelRef.current]
-  )
-
   function onSelectFiles(fileList) {
     const newFiles = Array.from(fileList).map((file) => ({
       id: 'file-' + String(Math.floor(Math.random() * 1000000)),
@@ -129,18 +125,6 @@ export default function UploadPage() {
     setFiles(files.filter((a) => !newFiles.some((b) => isSameFile(a, b))).concat(newFiles))
   }
 
-  function onChangeField(e) {
-    if (e.target.files && e.target.files.length) {
-      onSelectFiles(e.target.files)
-    }
-    e.target.value = '' // reset the form field for uploading again
-  }
-
-  async function onDeleteTrack(slug: string) {
-    await api.delete(`/tracks/${slug}`)
-    setFiles((files) => files.filter((t) => t.result?.track?.slug !== slug))
-  }
-
   return (
     <Page>
       {files.length ? (
@@ -192,39 +176,7 @@ export default function UploadPage() {
         </Table>
       ) : null}
 
-      <input
-        type="file"
-        id="upload-field"
-        style={{width: 0, height: 0, position: 'fixed', left: -1000, top: -1000, opacity: 0.001}}
-        multiple
-        accept=".csv"
-        onChange={onChangeField}
-      />
-      <label htmlFor="upload-field" ref={labelRef}>
-        {labelRefState && (
-          <FileDrop onDrop={onSelectFiles} frame={labelRefState}>
-            {({draggingOverFrame, draggingOverTarget, onDragOver, onDragLeave, onDrop, onClick}) => (
-              <Segment
-                placeholder
-                {...{onDragOver, onDragLeave, onDrop}}
-                style={{
-                  background: draggingOverTarget || draggingOverFrame ? '#E0E0EE' : null,
-                  transition: 'background 0.2s',
-                }}
-              >
-                <Header icon>
-                  <Icon name="cloud upload" />
-                  Drop files here or click to select them for upload
-                </Header>
-
-                <Button primary as="span">
-                  Upload files
-                </Button>
-              </Segment>
-            )}
-          </FileDrop>
-        )}
-      </label>
+      <FileUploadField onSelect={onSelectFiles} multiple />
     </Page>
   )
 }