I am still looking at this as I haven't really convinced myself that it is a good or bad thing/gimmicky or not!
There is a system called Centralock which is on
www.boltmaster.co.uk and also on another site which must be the same people with the address
www.cedardell.co.uk
Neither website has a price, so I have just e-mailed them to ask.
On the sites there are some nicely produced videos and it all looks easy enough to fit and use.
The examples are on wooden doors....but where I am the vast majority are aluminium. I have these at home and I can't really see a way to fit this without making some ugly add-ons to bolt onto the door and frame or door jamb etc.
It would seem a great idea (cost permitting) to get a job lot of wooden doors and fit them up in the workshop and then sell them as a "complete" system - door and central locking. Just fit the door and away you go. You can add windows etc at a later date.
But as I say, I can't see it being much use to me here as most doors are aluminium, and if they are not, then old wooden doors on old houses where they would think I was from the planet Zog if I suggested central locking.
They would probably put me out the back with their donkey (we still use them here as well as camels!!).
I haven't come across any other systems yet - apart from high-tech commercial stuff which is way too expensive for one off house jobs.
I think for anyone out there with the right contacts in the manufacturing industry etc. there is a HUGE opportunity waiting to happen....too bad I am in the wrong place!