Hi Luke,
Welcome to Bedfordshire

!
I photograph a lot of architecture so a few of my suggestions are biased that way but here's some ideas.
Shuttleworth also has one of the best bird of prey centres in the country and the Swiss Garrden, good for macro stuff.
Woburn Abbey and wildlife park.
Whipsnade zoo.
RSPB headquarters at Sandy.
Dunstable downs and Ivinghoe Beacon, nice panoramas and gliding/hang gliding type activities.
Nene Valley railway at Peterborough for steam trains.
Air museums at Duxford south of Cambridge and Hendon north London.
Motorsport at Santa Pod, Silverstone and Rockingham.
Oxford and Cambridge for architecture and street pics.
Castles/stately homes at Warwick, Kenilworth, Rockingham,Hedingham, Hatfield, Knebworth, Burghley all around 50 miles away.
Most of the villages have really interesting old churches, Marston Moreteyne where I live has wall paintings and the tower apart from the main building, Elstow has a ruined priory and some medieval buildings.
The river/ Embankment area in Bedford can be interesting for rowers, birds and night shots.
Hope that gives you a bit to go on, I'm sure there's plenty I missed so hopefully some more people will be along with their ideas. Looking forward to seeing some shots!
Stu.