At the moment Jeff, I think it could be leaking either from the hose into the heater (post 6, pic 1), or the hose attached to the bottom of the valve (pic 2/4). It could be the valve itself but the surrounding area and mounting plate is clean and the only evidence of a leak is on the hoses themselves.

I do need to check the coolant level as I had to top it up, and if I'm losing a significant amount then coolant is also leaving the system somewhere else. Unfortunately the weather is a pain in the ass at the moment!! This car isn't my daily so it's not crucial to my day to day needs.

I'm more of a bodywork/trim kinda guy than a spanner man, although have done basic jobs in the past (brakes etc) with success, hence my hesitance doing some things myself!!