thanks for the advice so far Tony.
gc number is 47-047-15
reading the manual there was reference to voltage checks on the pcb have two manuals one came with the boiler and the other i downloaded, and they are different....
was short of time before went to work to check these measurements...
as stated this boiler is flashing the warning triangle and showing the spark symbol, the manual says this is "no gas fault"
instructions are to
turn off
rectify gas fault
turn on
the house has gas as the hob works downstairs, gas is also switched on at the appliance and at the test...