Many thanks for your replies which I am grateful.
After looking at various threads on this forum, I took the plunge and very carefully removed the top half of the Carburettor, Unscrewed each jet and sprayed it with Carb spray and carefully cleaned out the float chambers. Unfortunately, I did all this without the necessary new gasket so I have had to replace the old one.(I'll get a new one tomorrow). I replaced all the carb hoses which I bought yesterday, having taken in small pieces for the motor shop to size up and have re-positioned the new fuel filter away from the heat of the engine (As I noticed other members have done). Put everything back methodically and got her going.
Took her for a quick spin and she went like a dream. That was until I got back home and found that idle was eratic and it kept stalling. Again I trawled through the forum and found out that after removing and re installing the Carburettor, I am supposed to adjust the idle and mixture screws to get it idling correctly. Duh !!!
I am very pleased with myself since I am the least mechanically minded person I know and come out in a sweat when something goes wrong with my cars.
I now only have to replace my alternator once again, as the battery light has come on again and sort out the earth lead from the starter motor as I am only getting the engine to turn 2 out of 5 attempts and just get a clicking noise other times. Oh and replace the speedo cable. Oh Oh and sort out the window winder as I think the cable has snapped inside the door. Never ending !!!!
One day I will be able to enjoy the car for more than 10 miles before something goes wrong..........