Plumbing question

I am particularly fond of long deep bubble-baths with an undemanding book.

Sadly, for the last few weeks I have been thwarted because my bath-plug has developed a hole. I bought a replacement thing purporting to be a bath plug from John Lewis, but it is of not quite the right shape and hence readily dislodged by currents of water, a defect essentially fatal to a bath plug.

What I can't see is how you replace a bath-plug-on-a-chain: the chain seems attached irrevocably to a triangular thing which is attached very firmly to the side of the bath. I guess the triangular thing would come apart if attacked vigorously with pliers of sufficient force, but am not confident enough that this is reversible to try it.

I suppose I pay the price of a return flight to Peru monthly so that I can ring the landlord and cause Tucker Gardner's pet plumber to be scheduled to solve the problem.

Making a note here: complete success

I measured the bath-plug carefully as 41mm base outside diameter, and wandered to town. Mackays sold me a beautiful inch-and-three-quarters stainless-steel bath plug with rubber O-ring for £4.58: they had sold out of cheap long-nosed pliers but I was able to borrow some, and the new plug is now fitted and shines in watertight splendour.

Maybe the best of all possible worlds would not have included the spectacular hailstorm that I got caught in walking over to pick up the pliers, but such is life, and ceb had a fluffy purple towel ready as soon as I opened her door.

There will be gratuitous shiny photos when BT have fixed my ADSL and I don't have to post from the iPhone, but at their present rate of progress it may be fixed by Easter.