In UK you can source pretty easy DRAPER Expert,
Stahlwille, Gedore, FACOM, Snap-on, wiha, IUS, Unior, Yato, Beta, KS-tools, etc - these are in the pro category and many of these will cost a bunch
But my guess is that any prograde tool will last a lifetime near bike bolts. Pro tools are used in high torque areas (400 Nm for a tiny bolt T55 is a lot.. here a cheap Yato tool will likely twist, a Draper will break and a Stahlwille may be up to the job.)
So hunt for cheap pro tools (that usually is a 1/4, 3/8, 1/2... square drive). Cheap and good tools are Yato, Powerfix (found in Lidl from time to time).. so go to any hardware store and go for torx bits that appear in matt grey finish with clean crisp edges in some sort of square drive or 10mm hex drive (but is overkill for small torx). I'd avoid 1/4 hex drive bits if they are unbranded and hobby level.
Facom and Unior differ vastyl in quality and price in my country - Facom being much higher on both accounts.
Bahco is very good, while not costing too much.
The really cheap ones of poor quality is something I'd never recommend - even for a hobby use.