So after some serious testing, (my Son and I) it appears the new French EA Servers added this year that mainly UK Xbox 1 Fifa 20 users connect to (As well as Some in EU) are poor for EA gameplay, also from my testing and online research, it would appear the new EA servers are hosted by Amazon (AWS) (lots of hops).
Traffic Routing for online gameplay is everything, so I have set up a VPN to Germany (Frankfurt) and the gameplay (FifaPlay) is much improved, only Saturday nights is when it is noticeable that the servers/connection is impacted.
Currently have a VPN running to Netherlands (Rotterdam) and again, FifaPlay is as good or even a little better than the former connection to Germany.
So looks like Routing of Traffic / Lag compensation Algorithm (yes there is one) and Hosting of EA Servers in France does not favour UK Xbox 1 Fifa 20 Players.
Disclamer: I realise choice of VPN service has an impact. but interested if others have noticed similar FifaPlay gameplay quality issues and if any UK locations (Scotland) are actually have good connection via EA ?
My Son is going for Elite this weekend on Fut Champs as a test 
In a completely sane world, madness is the only freedom (J.G.Ballard).