Hi Flog
I would get a large mudhugger. I had the 640mm on my analogue bike and transferred it to the Focus but it was too short so I added an extension piece on which makes it the same as the large.
They are not the the best looking but boy they do a great job of keeping your backside and bike clean.
Cheers
Nick
Thanks @Nick m but I did the web site and downloaded the phone app for the angle and went for the medium as they suggested, only too willing to. follow their advice as the 640 is 21 quid and not 30!! Incredible price for blow moulded plastic but as you say, clean back in a few puddles I've been through so. touch wood will be fine. Thanks for coming back tho.