External locker (Devon)

One of the two locks on the external locker of my Autosleeper Devon is jammed and so the locker cannot be opened. I have tried spray, wiggling the key, swearing, but all to no avail. Any suggestions? Will the lock have to be drilled out and then replaced?

Many thanks. However, I see on the red key website that the barrel must be in the unlocked position to remove it. 
However, the lock is jammed shut, so I cannot see how this will work.

I have two keys and they both go in but will not turn. I am slightly worried about applying brute force in case I damage the glass fibre door in doing so. What do you think?

Thank you for your patience and expertise. Much appreciated.

On my external locker, I believe that turning the key causes the metal bar attached to the spindle to rotate until the bar no longer blocks the door from being opened. So I wonder whether the combination of plying the key and inserting a thin blade to help that bar to move might do the trick? My guess is that bar is no longer bolted tightly to the spindle, and therefore doesn’t rotate.
 
But I’m no safe breaker!

Cymro

Thanks, Cymro. I shall try that in the morning - I am physically and emotionally drained by my efforts today. The mechanism is as you describe. I wondered if something in the locker had dislodged and was blocking the action. I even tried driving this morning and NOT avoiding the potholes to see if that would move the offending item, if indeed there is one. I shall let you know if it works.

Success (of sorts)! More wiggling had no effect, so I took the drill to the lock. It immediately turned and the locker could be opened. The lock itself will need replacing, but I shall order one from Autosleepers. The cause of the blockage might have been caused by the cable bag slipping against the lock mechanism, but I am not convinced that this was the case. Anyway, we can at least get away with things as they are.  By slightly turning the arm of the broken lock into a slightly closed position, it fits snugly over the rubber rim of the locker which can then be secured by locking the "good" lock.
Many thanks for your encouragement.

Phew! That’s a relief for you, PeterF. 
Well done!

Cymro

Ordered a replacement lock from Autosleepers. Estimated time of delivery: 10 weeks because it has to come from Italy!! Bravo Brexit!