were is the ignite button on my worcester 42i boiler?

I think you will find its electronic ignition on this boiler ie it has no pilot. If it doesnt light when you turn on a tap for hot water it is very likely there is a fault on a circuit board and you will then need to contact a CORGI reg installer/repairer as when a new board is fitted the gas pressure needs to be checked/reset

Richard
April 2006