I fancy pizza and thought it's about time I tried the oven in my van. Problem is the igniter doesn't work. I've been using the hob by lighting it via a separate sparker. Is the igniter worked off a small battery somewhere? If I can't find/fix that can I light the oven using the sparker? I have tried this but couldn't get it lit. I tried clicking the sparker all over to try an find some gas but no joy. It's a Rose 6070 on an old Talbot van if that helps.