hi, you have a few places to try...
Southend EGMC. Good airport, full atc, ils/ndb approaches. 40 mins drive.
Stapleford EGSG. Busy but basic tarmac/grass airfield. A/G RT. No procedural approach. 30 mins drive.
Andrewsfield EGSL. Nice grass airfield. A/G only. No procedures. Very close to Stansted CTR and not so easy to spot! be careful. 30 mins drive.
Hope that helps.
FL550