Underfloor electric heating

[Lathams Patt]

Hi all , I've tried searching for this subject and can't find anything so sorry if it's a repeat of others .
I'm installing electric underfloor heating in a small extension and the total current that will be needed is about 20 amps , anybody got any opinions on using two fused spurs off the main ring , or will I have to go direct to the consumer unit . The thermostats rated at 10 amps , so I'll need two , unless someone can come up with a better way .
P.S. - Yes I'm qualified and work as per part 'p' , but I've never done underfloor before , so all help much appreciated
Thanks
Dave

 

[JohnD]

This is fixed heating, and would use 60% of a ring final, so use two radials.

 

[Lathams Patt]

had a feeling that would be the case but thanks for your time
Cheers
Dave