car cutting out

[macduff]

Hi to all
wondering whether if anyone could help me on a little problem with my rover 620 si cutting out while changing through the gears while driving.started about a week ago when starting the car up everything fine,then when switching off engine and restarting it would not start for about 2 to 3 mins. put it down to maybe dampness or cold.but now i am experiencing the car jumping while driving as if it is starved of petrol or auto choke is sticking.yesterday,going round a roundabout i went up into 2 gear on to third and the engine just died,had my foot on the accelerator but nothing just cut out.this happened another 2 times after.it does not always happen,but any info would be much appreciated as iam at aloss at what it could be.
many thanks in advance.

[PJF220]

When was it last serviced? What's the condition of the dizzy cap and rotor arm? I've heard similar but not exact reports and it appeared to be old/faulty parts