The law is reasonably simple ... and Mr Plod will look at your VIN plate in the first instance before taking you to weigh bridges/court/etc etc
The plate gives (1) the maximum allowable weight for your vehicle (2) The maximum Train weight allowable for your vehicle. subtract 1 from 2 and that is the maximum BRAKED trailer weight your vehicle can tow.
For my 3.2 elite the figures are 2200 Kg, 4075 kg which leaves 1875. Your trailer weighs 550 kg .. so the weight on the trailer must not exceed 1325 Kg.
AFAIK that puts a miggy out side the limits .. unless it is partially stripped ??
Note (1)
All the above are referring to VEHICLE PLATED weights .. not ACTUAL weights ... as I said .. Mr Plod can read a plate easily . actual weighing takes time.
(2) You need a B+E licence to tow at such weights.....

Thats the law side .... now safety.... IMHO it is very, very simple ...and based on over 20 years of towing ....
If the weight on the "hook" is more than the car in front .... which will take control going down a hill at ANY speed

ie .. the heavier the trailer relative to the tow car ... the more risk you take .. simple laws of physics.
It has nowt to do with acceleration or braking (although they are important) .. it is all to do with the "tail wagging the dog" .. once the trailer takes control your brakes, steering and throttle are all worthless.
Just my views .. nowt else ..
