Completely flat battery on 1996 Chim

[Stevejones1967]

Can anybody help me, I have managed to run the battery completely flat on my 1996 Chim and the car is locked. I was re fitting the radio dash and I must have left the lights on. I have revered to the manual and have looked where they say there is and emergeny door unlock (I won't say were or how in open) and there is no key hole?
Can anyone tell me how I can get the door open without breaking in. My email address is [e-mail] in case the info is not for open forum.
Thank you in advance.