Am hoping to move soon. Have been all electric all my life but house will have a gas boiler and radioators and cooker. Haven't got a clue how to work any of this stuff - always been a bit scared of gas. What happens if a dial on the hob gets turned on with no flame? What do I need to know about all this! How does the hot water thing work? Is there a 'gas users instruction manual' somewhere. Do I need to get a gas detector or something? Any hints and tips would be much appreciated!