On Sun, 23 Mar 2014 23:35:05 +0000, Nightjar wrote:

On 23/03/2014 22:56, Dave Rove wrote:
If I understand you correctly, you're suggesting putting the lock
sideways on the external frame so that the lock's bolt pokes
horizontally into the door? Unfortunately, the shape of the external
frame doesn't really lend itself to that in my case:

http://i.imgur.com/6daIdSo.jpg

I suspect he means this sort:

http://www.screwfix.com/p/patio-door-lock/13541

It bolts to the side of the frame and the pin at the back goes into a
hole in the door.

I see. I'll get a couple of those then. Drat. I'd already opened the
packets containing the other locks.