Month in numbers

2 The weight, in kilograms, of the fabled Gem of Tanzania, used by the owners of Wrekin Construction to bolster its balance sheet by £11m in 2007. The Shropshire contractor went into administration in March with the loss of 420 jobs.

20 The percentage fee cuts Abu Dhabi developer Aldar Properties has asked its architects and engineers to deliver, as Middle East market woes spread beyond Dubai.

68m The amount, in pounds, spent on consultants for the M25 widening project, even though work has yet to start.

2016 The target date for zero carbon in all new housing is still achievable, claimed the UK Green Building Council, in reaction to calls to scrap the goal by the RICS.

150m The value, in pounds, of one of east London’s tallest tower blocks, which has been mothballed. Genesis Housing Group pulled the plug on the project, next to the London 2012 Olympic site, in response to the dire state of the housing market.

2bn The amount of government cash, in pounds, needed to prevent key offshore wind farms from being scrapped, claims the British Wind Energy Association. The recession means schemes with planning approval may not be built without state aid.

2.3bn The amount of work, in pounds, BAA framework contractors could lose if Gatwick and Stansted airports are sold. The airport operator has been ordered by the Competition Commission to sell the two facilities within two years.

50bn The amount of capital investment, in pounds, being given to Partnerships for Schools, the government’s secondary school delivery body, to deliver a further 30 education building programmes, including the £7bn primary capital programme.