Tricky Dicky has brought this to us :
Have you not considered making your own bracket. Two metal frames with a
vertical hinge at one end, the front frame designed to match the fixing holes
on the TV the rear frame fastened to the wall swing it out like a door.
Easily available MS tubing would do the job and if you cannot weld the
brackets then pop rivets can be used to join up the steel sections. A lot of
brackets on the market are frankly over engineered more to assure the user of
their safety than function. Most TVs are quite light our 55" is a fraction of
the weight of the 40" it replaced yet the bracket holding it to the wall had
eight substantial bolts yet the whole thing combined probably weighs the same
as a kitchen wall cupboard filled with can goods secured by only two fixings.

It hardly seems worth the effort of DIYing a bracket, for the sake of
sub £18 ready made. This is the one I bought and suggests it is good
for up to 60" and 45Kg. Though in part of the description, it suggests
up to 70" screen.

It does need good solid fixings onto a suitable wall. I used 6mm
expanding bolts (Rawlbolts) for the top three fixings, taking the
weight, then large plugs and screws for the lower fixings.