Thanks for your help everyone.
I checked the fuses, as when I got it home had to replace the front right headlamp bulb. Found five spare bulbs dotted around the car... which leads me to think that the electrics might be knacked. Changed the bulb to no avail, checked the fuse board and the right hand headlamp fuse had gone (no12 off the top o my heed?). Saw that there was a fuse for the pump and checked it too, but it's intact.
The display for time/date/radio station is knacked too, which makes tuning the radio a trifle tricky. This might be an after effect of having a Nokia hands free kit installed by the previous owners' son-in-law who was a travelling business type person. This device is of no use to me so at my earliest convenience, I shall remove it and see what happens there.
Next question, therefore, is which Haynes manual is most relevant to this model as there wasn't a specific one in Halfords and the Haynes website doesn't even list Vauxhalls, or Opels even... Probably need a new thread for that one.
A friend of an uncle runs a garage and I shall get them to check all this out, as well as the tyre wear on the offside front wheel, which I think is a tracking rod, unless, again, anyone has other ideas?
Cheers!
Al.