Hi guys and thank you for the replies.
I will try that guy tomorrow Twofor1
))
Ircoha - my back door is stuck locked at the moment and it looks like the lower "hook" of the 3-point locking system is stuck or damaged in some way. I haven't even attempted to try to force it open as I don't want to end up not being able to lock it and then having to wait for someone to come out. I am hoping that I might be able to get a 5-point lock in there as a replacement if at all possible.
(I am in no way handy or interested in trying to get this fixed by myself - but thank you for the kind offer
)