These documents can be more clearly read here:-

In the document below from March 2008, the Council says the cost they have worked on for the project is £1450/m2.

I was questioning and questioning the rising costs of this school. To try to shut me up they had to come up with some sort of explanation for exponentially rising costs. In this document they explain the size of the school has gone from 2600 m2 to 3185m2. This is a rise of 585m2 and we see the cost they have given is £1450m2. 585 x £1450 = £848,250 and not the £1,050,000 they claim.