Boot won't open

[Finny]

I went to check the boot on the sedan last week and couldn't get it to open.
Key fits and turns, but won't open.

Just doesn't seem to have any movement at all.
Wondering if any has found sticking seals can cause problems or mechanic issues?
I recall the seal making a noise last time I opened it.

If it is the seal, it's holding really well.
Not a lot to open it with and with a lot of effort the catch is moving, just not the boot.
Any experiences with this that worked.

[Devilrod]

Might be worth pulling out the backseat and climbing through to have a look?

[Finny]

Back seat gone, gas tank just as large.
But could just see down one side.
Looked like a 2 inch long thing sticking out of the lock.
Something had obviously come adrift.
My son managed to get it eventually, with a bit of muscle.
Now need a new lock plate.