Fitting A Leisure Battery

Don't think our Talbot Express AS Harmony has ever had the optional leisure battery fitted.
We'd like to put one in. We're based in Brighton. Can anyone point us in the right direction?

Victoria Street in Portslade has been mentioned as have Premier Motorhomes nr Chichester?

Thanks

Are you doing the job yourself or paying someone else to do it?

BTW. It's better if you put "Talbot Harmony" in your profile rather than "Talbot Express T1000". That way, folk like me will have a better idea of how best to help you.

Frank

Decided after a little research and help from various people ( thanks to this community), to jump in with an Elecsol 100. Any advice from anyone else who has one of these would be appreciated. Especially regarding looking after them.

Thanks