Need help please

Need help please my battery on my defender 90 keeps going flat put the jump leads on it and my ignition lights stay on even tho the keys arnt even in ? Got it started the lights went off but I could take the keys out and it would still be running when I finally turned it off the ignition lights went off like normal come out to start it again and it was flat anyone help me on this one :/ ? Cheers

relay stuck on or ignition switch faulty?

draining battery.

Is it worth taking the ignition out and cleaning that first?

yes

Cheers