It sounds as if they are changing the Works Information by introducing extra work.
This involves, from what you say, more people on site for longer. There is therefore - and this is the key thing - a change in Defined Cost. This is therefore assessed in accordance with clause 63.1 i.e. you get the change in Defined Costs + Fee.
This involves, from what you say, more people on site for longer. There is therefore - and this is the key thing - a change in Defined Cost. This is therefore assessed in accordance with clause 63.1 i.e. you get the change in Defined Costs + Fee.