Hey,

 

I can unlock and lock the car doors from the boot lock, but the boot doesn't lock. It can still be opened when all the doors are locked.

 

Would I need to do something like this but just on the boot its-self? http://www.briskoda.net/forums/topic/126257-octavia-1-replacing-door-latch-microswitch/

 

It's in great condition but used to be used as a transporter for something, so the boot was opened and closed many times if that helps.

Any ideas folks?

Most likely yes, get thd trim off and hau a look. Get some electric contact spray cleaner into the lock barrel and the mechanism to check for corrosion. Also have a good look for any water ingress as it might just be a sticky lock.. if no joy start looking? at micro switch