My mother recently bought a flat in Camden Town. All the windows need a bit of attention. They are double glazed sash windows, aluminium frame I think. The top part of lower frame slides up and can also pop inwards away from the window. The top frame slides down and up. Photos attached. Does anyone recognise the make? They all need a bit of attention, some are missing clips, one of them does not open, some do not lock, etc...
If anyone can ID the product I would be very grateful. The management company of the building do not have a record of the manufacturer.