Keston 25 Celsius?

The pilot light flashes on and off all the time
The central heating is not working.
And the water is not heating.
I have switched the 'on' switch to 'standby'.
Is this the correct action as I wait for a plumber?
OR can I get the pilot to flick back on by turning the 'standby'switch on and off in some way?
2 questions?