There will be a flow restricting device, which can usually be removed, as long as you realise your HW in the winter may not be hot enough for a bath if you don't turn the tap down. The temp will not then be controlled by the boiler circuits.
Most combis have a restrictor/shut off valve on the cold inlet pipe. Might be a screwdriver slot on the Baxi. The restrictor would be in and around the pipework in that area, I don't actually recall where on a Baxi. But you can bet it is where there is a nut to undo, check obvious junctions around the pipework to and from that valve. Turn off stop tap and run a kitchen cold tap first.
Here
is NOT a picture of where it is . I expect it'll be where the cold water inlet pipe meets the input block item 80. Probably a small disc with a star shaped hole and O ring in it, which will fall out with the filter when you guess the right pipe union to undo.
The pic is at partsarena.com/baxi.
If you call baxi tec they might steer you to the part.
As you see it's a fixed 12 litre/minute one - check you are getting that, otherwise removing it will make no difference
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