Holes drilled in double glazed windows?

[SeatIbiza]

Just as an update. Contacted council, they seemed un-interested and offered no further solution.

Mum keeps complaining about having to put the heating on more since it was done.

I've secured an appointment with CAB later this week to find out if there's anything we can challenge legally with.

In my mind their "repair" has had financial deteriment to the tenant and as such entitled to re-imbursement and a competant repair to the standard that she accepted the property with.

Double glazing is actually very cheap. I found replacement panels on ebay for a very reasonable price (although collected from Watford area) and I paid under £20 for the glass which I would call a normal sized pane. I paid about £115 for a big piece for a rear fully glazed door with a cat hole in it. I thought that was good.