bell push 
noun British
A button that operates an electric bell when pushed.Compensation of £180 must also be paid to North Yorkshire Police for criminal damage to a bell push at Scarborough Police Station....
- Recent criminal work undertaken by the county court judge before his trial included drunkenly obstructing the police and yanking a bell push from the wall of his cell.
- A preliminary jab at the bell push at the end of the first verse of the first carol had been followed by a more imperious ring and a garbled version of the old Christmas is Coming rhyme.