Ended up speaking to a guy called Paul from this site,
http://lindenbatteries.co.uk/
Sound guy and very helpful, it seems either the Braille B14115 or Tomioka TR-B1100 will do the job and will fit our connections,
If you do order the Tomioka and look at the picture of it on there site you will see the connections wont be the same as what is on our cars, but it will come with the right connection,
I was told the both batteries were made in the same factory, I ordered the Tomioka TR-B1100 it costs slightly more but has a two year warrenty, both batteries have free next day delivery aswell,