I haven't seen many UK versions, but in general most arcade ports were horrible on the Amiga - and obviously not the machine's fault.
I can remember an odd one - GODs (one of my old favorites) on the Amiga was not as good as on the Sega Genesis (looked the same, but played MUCH slower on the Amiga)... But I digress.
There were some ports that were actually better on the C-64 than on the Amiga! Try to figure that one out (could it have been greed?)