Just checked and 7 of the 20 radiators don't have trvs.
Ok I will turn it down a bit too
Silly question but I also read somewhere modern systems don't need balancing precisely as the pipe work installed is smaller diameter restricting flow this way to each rad. When we moved in all lockshields were fully open. I still think this is wrong but wanted to check. After attempting a by hand balance we do get much better warmth in a room that was previously too cold.