Depends on where you are travelling to and who with, however as far as I am aware the same applies for most airlines:
Longhaul destinations - allowance of two pieces with each piece weighing no more than 32kg (the 32kg is quite strict and adhered to by most airlines, definately by BA)
Shorthaul destinations - allowance is normally 23kg, this again depends on who you travel with, if you are not sure then check your ticket the weight allowance is always displayed there.
Domestic destinations - allowance is normally one piece weighing no more than 32kg
If you are travelling on a multisector journey ie MAN-LGW LGW-BGI and return then the greater allowance goes for the whole journey
If I said that I have never charged for Golf clubs as excess on a shorthaul route, you may be able to make your own conclusions, this will vary from route to route, airline to airline and even hub to hub
Hope this is of some use
Regards
Bluejay