Couple of questions:
Our plumber didn't seal round the toilets (they can't be screwed to the floor because of the UFH). I'm more competent than him to seal round them however I still haven't got round to this. Can anyone advise which sealant I should use? I've got a Screwfix and Toolstation order to put in so I want to get it ordered. Also, is there anything I can get to put in these holes - I presume this is where they would be fixed to the floor normally.
Aim for nothing bigger than a 5mm silicone bead if you can. Not always possible. The Fugi tools have it stamped on them.
Do some practice runs on an internal corner made from scrap etc:
In all honesty I did mine with a generic, looks like a Fugi tool but wasn't and ripped it all out when the good folk here pointed me at the Fugi kit. A revelation!