Well, for Tablet Adobe has designed the Mobile app called Lightroom Mobile App. You can add you images from the tablet to the app and sync the desktop collection as well.
Use the below download link for Android based platform: Adobe Photoshop Lightroom - Android Apps on Google Play
Else, search it on Google Play.
Hope it helps.
Thanks for taking the time to reply, Mohit. I have used the mobile app
for editing and its great. My 'only' issue was that it doesn't appear to
support local (brush) adjustments, &/or graduated effects, and I thought
these might be supported in the web version?
Yes, it does but you need to use Lightroom Web on a PC or Laptop to use that edit option.