National Grid - Gas - letter confusion...

Received an important-looking brown envelope from national grid saying (on the outside) that the gas supply was going to be cut off. Inside, the letter said that although there would be a lot of work going on the street "there would not be any interruption to the gas supply"!

So which is it, am I going to be cut off or not?

I would phone them up to find out then questioning their contridiction message.

I bet they've got the crystal mark for clear English as well?

I'm guessing they'll come and knock the door immediately prior to any interruption of the supply. Prior to that they're unlikely to have a clue whether it will happen or not.