TRVs. Do I need an automatic bypass?

[cloudsix]

I want to fit some TRVs throughout the house. Do I need an automatic bypass installed if I don't have a TRV on every radiator? I won‘t have one in the hallway, kitchen, and upstairs ensuite.

Further to that, if I do need one, do any boilers come with them pre-installed? I have a Worcester Greenstar 30si combi boiler.

Thanks in advance!

 

[ShaunCorbs]

Best to or have a bypass radiator eg lockshield rad valves on both

 

[cloudsix]

OK, I think it should be fine then as the 3 radiators with no TRV all have lockshield valves. Thanks for your reply!