Cheers James & co!
Not sure of bell brand and model but it is not an old 'ding ding' bell, its a flatbox siren so I am 99% sure it will be compatible as worked fine with the Accenta 8 Mini.
Am ready to place an order for a new alarm and also a backup battery, but just one last thing please... I could do with another battery for a different alarm and would appreciate you letting me know which battery I need please (only if you know). The alarm is an 'SL Compact'. That is all I know, but maybe a photo could help you identify it? Its been fitted for about 9 years.
It would be great if you did know what battery I need for this other alarm, as soon as I read something back I will place my order.
Thanks again for all your help, it is making the whole order process alot easier.
Cheers.
GPH01