Not finding a lot of concrete evidence that ranks all the models together...that is also current. Maybe someone else has something? Most anecdotal web sites I found ranked it Euro, CMC, GFS but they did not discuss the UK. Location of fronts and areas of pressure have more input I believe than the apparent weather we worry about in the end. I found charts but they were all 90 day type things. The GFS was pretty much last in all charts I saw but some were before the change to the "Fv3".