Gas Supplies fall to Low Levels.

[Sonyc]

Yes, we thought about internal insulation after we were told we couldn’t do anything else, but shortly after that the house that we’re buying came on the market so we didn’t go any further.
Might need new windows in the new house though-are Colin’s local to you or do they supply all over the country?

Shipping and Return Policy - Colin's Sash Windows

As all our products are custom-made, shipping costs are calculated based on the size, weight, and destination of the order.

colinssashwindows.co.uk

UK wide yes.