Thanks guys!
I've been out only 4 times now. yesterday I did around 4-5 miles with a 300m peak. Apart from the climb I felt great! I felt in control and felt I could have ran quite a bit further (apart from my knees & calves).
I'm stunned that my fitness seems to have improved in such a short time.
prior to this run I was puffing & panting beyond control.
I was absolutely caked as some of the puddles on the moor peak were almost knee deep

It was superb!