Are these taps / toilets fed from the loft cistern, or on the mains? It could be the float valve washer vibrating, water hammer, due to pipework that may need more clips to secure it. Could also need a washer replacing, a new inlet float arm, etc.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local