Under JCT Minor Works Building Contract 2009, is it legitimate for a contractor to set a price and insist on agreement before carrying out the work?

This is dealt with by clause 3.6.2 which stipulates that a price should be agreed before instruction is carried out. However, 3.6.3 documents the architect’s legal right to set the value of work should no agreement be possible. It should be noted that the contractor has no right to refuse to comply with an instruction simply because a price has not been agreed by both / all parties.