Got it -apologies for not spotting this after your first suggestion of it Foxhole (hard to concentrate with the baby in arms!) - the door keep is misaligned - guess we need to unscrew it and chisel the hole for it so the keep can be reattached in the right place?
Seems so obvious now (the previous tenants apparently put up with the door blowing open on them all the time for 2 years!)
Many thanks
Lily
Seems so obvious now (the previous tenants apparently put up with the door blowing open on them all the time for 2 years!)
Many thanks
Lily