I once again appreciate everyone's input here. I had the opportunity 3-4 weeks back to descale the Barista. It became apparent rather quickly that this was the problem. Almost as soon as the hot water and citric acid went into the machine all started working again. I was very surprised as it had not been many uses on the machine after the last descale but this does prove the point the less use on a machine the more scale builds up.
Well, the Barista is back to pumping and one of these days I may fire it up so we can enjoy some espresso. (Hopefully I won't have waited too long and it needs another descale
)
A big thank you to everyone who helped me out here.