My argument is that ZUFFA fighters shouldn't be included in the UK rankings.
Very rarely do they fight in the UK.
ZUFFA fighters have reached the height of their careers and should only be ranked in the world rankings, if they are good enough. I would also count them into the European rankings.
I would rank Winner above Terry Etim, yes. 2-0 since leaving ZUFFA and both on UK soil against good opposition.