Installing wet underfloor heating - would so welcome any tips or advice

[Alwaysmore]

We are doing quite a big downstairs kitchen/dining room and rear extension.
We’ll be taking up the floorboards and putting in a new concrete slab throughout and so have decided to install wet underfloor heating through the space with engineered oak flooring.
It will have a large rectangular roof light over side of back TV area and 4 meter wide glass sliding doors. Roof height in kitchen/dining room will be 2.9 and 2.7 in tv room…all open plan.

Can anyone share any tips I should be aware of?
I’ve trawled through the past threads and so far have some advice but would love tips on anything I’m missing….I’m worried I’ll miss something that I will end up regretting.

So far I’ve been advised to….
-try and ‘zone’ the spaces so you can adjust the temp in case the kitchen section gets too hot etc
-make sure the thermostat is on an internal wall
-check if it all needs to be on a separate circuit from the rest of the house rads.

Anything I’m missing??

Is it wise to allow for a wall anchored rad also as insurance? Could this be ‘capped off’ and removed if it becomes unnecessary?

We have wet underfloor heating. Love it but still rely on the radiators.
*It doesnt turn off and on like rads, takes time to heat up. It takes a while to get used to but works great with supplementary heating such as radiators to take the chill off. Autumn and spring are very variable and can go from hot to cold in a couple of hours. The UFH won't be able to react that quickly.
*Certain floor coverings are better than others. We have stone which acts as a storage heater. Carpet and wood do not have the same effect.
*Insulate under the UFH otherwise you'll loose a lot of heat into the ground.
*Each room/zone separate. Our utility is rarely on but the hall is always on.
*Try and link it with the outside air temperature.

Make sure pipes aren't laid under any cabinets and leave a gap of 10cm from any floor cabinets.