A lot of misinformation as usual!

As 1 person has said and got right, provided the MAM of the vehicle and what its towing do not exceed 3500kgs and the weight of the trailer doesn't exceed the limits of the car - its legal for post 97 licence holders to tow.
The 750kg limit is the maximum weight allowed for an unbraked trailer for anyone.

Best options for us with these licences if you don't want to do the test is to run a disco/d90/rangie or similar. They can tow 3500kgs and there's a few light single axle car trailers available allowing you around 1100kgs for a small car.
IIRC the old Kia Sorrento could tow over 2000kgs too as a cheaper alternative to a land rover product!

Heres the definitions for the categories - See Cat B:
http://www.direct.gov.uk/en/Motoring...ons/DG_4022547

If you intend to tow regularly and to remove all doubt its sensible to do your test, shopping around you can get it for between £4-600.

Also get yourself to a weighbridge and make sure you know 100% that you're within weight if you aren't doing the test. VOSA are sharp on towing limits, i may have posted it on here before but they recently setup shop outside a country show at Hickstead and checked all the weights etc... of traders and horse types.