Bathroom floor wet; water coming _out_ of bath overflow.

Came home this evening to find the bathroom floor flooded. Noticed a weird thing - water was coming _out_ of the bath overflow, into the bath and down the plughole. I presume this is causing the leak, but have no idea how. Anyone got any ideas? I've turned off the water but don't want to rip the bath's side off yet.

P.

When you rip the bath panel off you may find that an adjacent cistern overflow has been piped into the bath overflow - check any WCs or storage cisterns nearby

Once I'd mopped up all the water, I noticed that the toilet cistern was dripping. When I checked, I found that the outflow pipe from it was leaking; it's not securely sealed to the cistern. And the reason why there's so much water outflowing is because the ballcock is broken! So 2 things at once resulted in the leak.

Even with the water shut off, there's still a dribble of water coming into the tank (leaky seal somewhere else?) so I had to whittle a wine cork down to plug the inlet (and no reason to waste the wine afterwards). Plumber on the way, hopefully.

Thanks for the response,

P.