"Both toilets noisy"

[chrisd265]

When I flush my upstairs or downstairs toilets they make a foghorn like noise. When I apply pressure to the polythene fill tube it gradually goes off, more pressure to compress the flow and it goes completely. if we turn the taps on it gets worse unless pressure is applied to the polythene fill tube. Can anyone advise me what could need replacing. Thanks in advance.[/b]