Glaziers (for fitting cat flap) in SE London

[BoBoo]

We currently have two cats and zero catflaps. They like to go out, they like to come in, they like to go out when they have just come in and like to come in when they have just gone out. I would like a cat flap. There's nowhere really to fit one in the wall and the front door is not an option, so we're left with putting it in one of the patio doors.

I understand that they need to cut new glass for the door, so unfortunately this is looking like it's going to be a bit pricey. I've had a quote for £390 . Has anyone had this done in London for a more reasonable price?

Don't know of any glaziers around your way, but have an alternative sugggestion - could you put cat flap in a window with sill wide enough for cat to sit on? Then outside you just need strategically placed large planter/plank of wood running down to help cat.

Hi madrush. Thanks for the suggestion - the only windows at the back of the house are behind the kitchen table and behind the sink/draining board. I don't really want the cats trailing in and out over either and the windows are also double glazed so I wouldn't have though it would make much difference price wise.