the evidence is this:
LCVP Mk 5: first 7 in use since 1996
HMS Ocean: commissioned in 1998
because of this, it is very unlikely they have equipped the Mk 4 or older types on board
not impossible, but the fact that they are launched by specialised davids, and the Mk 4 type is being replaced by the Mk 5, makes it very unlikely that the davids were constructed so that they could handle the Mk 4 as well, especially since the Mk 5 is quite a bit larger.
note also that these 7 were excluselively for the use of the HMS ocean, since the other 2 ships that carry them, the albion class, were not commissioned before the next batch of these landing craft were delivered.
(also note that it is impossible to give photograpic evidence an ship did NOT carry an type of landing craft, only if they actually did
)