Finally getting my mind into gear with regards to fitting an extra battery in the boot but....does anyone have any thoughts on the size (Ah wise)?

After a bit of research it appears that in the simplest installation ideally the batteries should be identical (or as near as) but I'm not in the mood to pay the better half of £200 for a matching battery to the one that's upfront (and I'm not sure the space would be big enough anyway) so over to you especially those who have done it....

Note: this will be a direct connection to the rear fuse box without any relays as I want it for a bit more 'oomph' when starting not for running accessories

Do a search on here. There is a lot of info on what and how to install a rear battery.