“ This sub-clause, where stated in the Contract Particulars to apply, qualifies the prohibition upon assignment to meet the practice of some Employers who transfer an interest in the building immediately upon Practical Completion. However, this right is extremely limited. Note that: (a) such assignment may only be made after practical completion; (b) it is not the benefit of the Contract that may be assigned but only “the right to bring proceedings in the name of the Employer”, so that it is more akin to a contractual right of subrogation than an assignment proper; and (c) the proceedings are themselves limited to proceedings “to enforce any of the terms of this contract made for the benefit of the Employer”