we will mostly use in another location/house. Presumably we have to get the other location BB enabled;
do we ask BT to do this and is there a cost?
Yes the line wil need to be BB enabled by whatever ISP you choose, they will get BT to enable the line.
Depending on who yu go with there may be a setup charge although most ISPs do not charge. There of ourse will be the normal BB running cost of approx £20 per month for your BB package at that location.
Secondly, once we are so enabled will we be able to use our current ISP etc and settings in the other location.
Now thats a good question. If you talk to your current ISP they may let usyou use same accont from a different line but usually you would just set up a new account.
It is easy to have two seperate accounts on the laptop and just use the one appropriate to the location.