It's a single fitment with two tap heads, one outlet to fill the bath and a tube up to a shower head. Press the ring down on the bottom of said tube, and the water comes out of sohwer head. Turn off the taps and then on again,water flows into bath.
but it isn't - it keeps comoing out of shower head. I presume some sort of return spring has failed or something like that - has anybody any ideas ? M