Repairing and draught proofing sash windows

[AnalogKid]

Thanks for the replies - I'll give Oxera a go -

Also - I'm sure you've would have come across this - If not - its a good read - Society for the Protection of Ancient Buildings -
An interesting to read PDF on Sash repair

https://www.spab.org.uk/sites/default/files/SPAB%20Technical%20advice%20note-Repair%20of%20wood%20windows.pdf