Neon Jay
Are we there yet?
Bad idea Tek, you might just end up releasing Carbon Monoxide into the house; it wouldn't be that difficult to actually run the cable next to it but outside the chimney (i.e. conduit in the corner OUTSIDE the flue) but I'd strongly suggest you avoid puncturing the lining altogether. Likewise, your house insurance (as djwellis suggests) and mortgage provider are highly likely to kick off about this one.
If you need me to help find another method I'll happily come round and take a look at that, should be relatively simple to run some cable conduit through the floors / ceilings without too much trouble.
If you need me to help find another method I'll happily come round and take a look at that, should be relatively simple to run some cable conduit through the floors / ceilings without too much trouble.