A plethora of lukewarm efforts, with two clear favourites.
Midfield Diamond comes second once again (Mrs Diamond must be exhausted) with:
'Turbo B calls for ‘The Power’ to be applied to the central heating'
And Brian takes gold for the simple :
'1c = 33.8f'
Hat tip to Mr Target for temperature pedantry : '-40C = -40F'.
Here is the baton Brian, please avoid ‘Back up your Brain’ as a subject, I think it may have been done before.