Following on from previous answer,
Would I be correct in saying that the Supervisor should only check for the standard of work INCLUDED in the Works Information? i.e. if the Supervisor was personally aware of specific testing requirement relevant to the Works (e.g. a British Standard) , he/she should not ask for this to be carried out UNLESS they have been specifically included in the Works Information.
It is ultimately up to the Client’s to manage the risk/cost of fully (100%) complying with industry standards - or not.
That said, beware of poorly drafted Works Information with catch-all statements such as ‘All work to be carried out in accordance with relevant regulations and standards’. This neither lists the testing requirements or brings any ‘specific’ standard into the Contract by reference - and can be interpreted in significantly (£££) different ways.