When you turn the ignition on the system initialises itelf, the speedo indicator moves left to right and left and all the lights show and then go out ready to start up and go- at the same time what I might vaguely decsribe as an electronic wooshing type noise is emitted - fine - however this noise has started happening after i turn the ignition off and take the key out - any ideas why....dru

Tacho reset, probably.

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"It is often said that before you die your life passes before your eyes. It is in fact true. It's called living."
Terry Pratchett

Fuel pump maintains rail pressure on a hot engine.

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

As says, it's the fuel pump - it will cycle on start up and also after switch off if the bike is warm - nothing to worry about, they all do that sir !