Obviously if you go to an office/factory/shop etc your employer has to provide it but I'm thinking of anyone who has people working for them in their own home. Talking to friends who do community nursing and tradespeople working for me they frequently find people won't allow them to go to the loo or offer them a drink no matter how long they are there for. It staggers me that anyone wouldn't provide basic facilities. If it is an issue with cleaning there should be the right to deduct an amount from any bill to cover it.