E46 M3 check engine light - recommend a garage Southend?

[trackdemon]

Morning all,

Picked up E46 M3 last night, good deal with a mate, but the yellow check engine light is on and I've had it go into limp mode a couple of times. Can anyone recommend a mechanic in the Southend area who could plug into the OBD to figure out what the problem is?

many thanks,
Steve