Thinking further about it; I suppose it may have been damaged in an attempt to break in...
In which case - a good lock.
Anyway, seems you won't know until the lock is looked at - best by a locksmith!
Do you have exposed hinges on your door? If so, it will be relatively easy to get at the lock... If not, a locksmith becomes essential.
I'm still of the mind that it has jammed somehow. Try again when it's cooler.
Well having just returned home and having to climb over the fence again - I have perfected my technique now so no injuries this time
- I am again checking the lock after receiving your words of wisdom.
Thanks for the break in scenario -
- that has left me slightly unhinged.
I have tried to budge the bloody thing again and it is definitely having none of it
I will have to resort to the locksmith scenario I think.....