Ambassador, British Airways; FlyerTalk Posting Legend
Join Date: Apr 2012
Location: Leeds, UK
Programs: BA GGL/CCR, GfL, HH Diamond
Posts: 42,703
You can’t go in to T3 from landside without a T3 bp.
In terms of hotel recommendations there are quite a few threads on the UK board with suggestions based on your budget and desire for convenience - sorry I am on my phone so it’s a bit difficult to link to but do have a look.