The AIP gives advisory minima for IMC rated pilots of 500 ft for a precision appraoch and 600 feet for a non precision approach. Normally an IMC rated pilot would add 200 feet to the MDH or DH with an additional 50 ft PEC to DH for non calibrated aircraft i.e most light singles and twins. The AIP advises pilots not in current practice (28 days)to add a further 100 ft. Legally however, you can operate to the published minima.
AIP AD1-1-2 Para 3.3.2
[This message has been edited by StrateandLevel (edited 15 September 2000).]