Might chuck a curtain pole and curtains up above our leaky front door. Reckon it would pay off in a couple of years tbh - I won't be paying anyone to fit anything which lets face it is where most of the cost is going to come from with OTP stuff.
This is really worthwhile. Used to have one in the early '90's when I was living without central heating. All of this stuff should be making a comeback this winter.
Thanks @Howard too.
Yes we have single glazing in bedrooms so will help a lot. Got shutters which will use too.