NO PILOT LIGHT ON GLOW WORM ELITE 21 PLUS BOILER?

THE BOILER IS BY GLOW WORM , THE MODEL IS ELITE 21 PLUS (SERIAL NUMBER (01013677) I CHANGED PILOT INJECTOR AND ELECTRODE BUT STILL NO PILOT LIGHT. FIVE LIGHTS LIGHT UP BUT THE LAST ONE TO SWITCH THE MAIN BURNER DOES NOT LIGHT. MANUAL SAYS POSSIBLE HT LEAD (WHAT DOES 'HT' STAND FOR) OR CONTROL BOARD FAULTY! IS THERE ANY CHEAPER OPTION?
AT THE MOMENT I'M JUST LIGHTING THE PILOT LIGHT WITH A MATCH WHICH THEN IGNITES THE MAIN BURNER & WE HAVE HEATING & HOT WATER
BUT THIS CANNOT CARRY ON, TAKING THE COVER OFF & LIGHTING IT EVERY TIME! I'M VERY CLOSE TO CALLING BRITISH GAS & TAKING THEIR £34.50 /MTH CONTRACT FOR 12MTHS!