Theresa May's decision to 'pause' approval of the new Hinkley Point C (HPC) nuclear power station has addressed one concern about the controversial scheme, but only one.

The deal, which will see French firm EDF and the Chinese Government-controlled CDG group jointly fund and own the £18m power plant, will go ahead with the caveat that the UK Government retains a veto on any possible future selling-on of the facility.

This is somewhat reassuring, but does not fully defuse alarm over the potential national security issues inherent in granting ownership of a key piece of national infrastructure to foreign firms and - effectively - the Chinese Government.

Other significant problems remain unaddressed. For one, EDF has its own financial problems and is currently constructing two plants in France and Finland, both of which are over-budget and behind schedule. The design planned for HPC has never worked yet, anywhere in the world.

To get the French and Chinese to foot the bill, the Government has had to promise £92.50 per megawatt hour of power produced, almost double the current wholesale energy price. Reliable estimates suggest the cost to bill-payers will be an extra £25 a year for 35 years.

The trade-off here is paying a guaranteed higher rate in return for a reliable low carbon source of future energy. It is hard to judge whether such a subsidy represents good value or not.

Relying on low wholesale prices into the future seems foolhardy, but nuclear technology while good for meeting climate change obligations is environmentally problematic due to the waste generated.

Tom Burke of green thinktank E3G said that with grammar schools and nuclear power, Theresa May is "building a better yesterday".

It would be good to see similar sums invested in renewables, but there is a need for urgent replacement for the 20 per cent of energy provision currently produced by the UK's ageing nuclear power stations.

As a result, nuclear power needs to remain part of the UK energy mix at present. But despite the Government's reassurances, this remains the wrong deal, at the wrong price.