Engine mount squeaks?

[Harry Flatters]

Out on a run yesterday and when it was hot, on idle/tickover, there was this twittering squeak coming from vaguely around the gearbox area. Sounds like a squeaky bush type of sound as the engine rocked back and forth. Anyone else had similar?

[Classic Chim]

Back and forth, sounds like gearbox mounts.

Jack the car up from the front and turn steering to full lock and poke your head inside the wheel arch and look to see where your exhaust manifold pipes sit in conjunction with the top Chassis main tubes on both sides.
If you have a gap of around 10 mm to tubes your engine mounts should be ok. Using a torch you can also check condition of engine and gearbox mounts.
Run the engine and get someone to Rev it from idle whilst someone observes engine/ gearbox rubber mounts looking for movement/ loose bolts.