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yayyyy all sorted, thanks everyone!!! The mechanic came and used his portable battery thingy and it started up instantly!!! I've been to asdas and got petrol and supplies in now and it re-strted at asdas and at the garage with no problem....and, the mechanic noticed that when the ignition came on the radio/cd player was lit up and he's disconected it cos he thinks it was the cause of the battery discharging, and i must say, it certainly fired up better than it usually does, and so maybe i should have a word with Halfords as they fitted that radio/cd player (in 2006 but even so lol). Thanks anyway, it must have been the old jump leads this morning so you were right about that.