It has been announced that manufacturing is down and the £ is down, all of which means that the balance of payments gap will get bigger and we will get relatively poorer. The answer from the La-la landers: build an airport, build a railway line, build more houses, or print more money.
The problem with building stuff is that it only shuffles the available money around within the economy... and it is expensive. Well, it depends upon who is in charge of the abacus. The British Chambers of Commerce (BCC) want measures to build 100,000 new homes at a cost of £30bn. Meanwhile the CBI says we should spend £2.2bn on "high-growth areas" and that some of it should be used to build 50,000 new affordable homes. Now I am no mathematical genius, but one, or both, of those figures must we way out!
Not that it matters, building does not grow the economy - manufacturing does. In the first instance it produces things for us to buy, meaning that we do not have to import so much. In the second, if we make the right things, we can export them for others to buy. We cannot export houses or airports or roads, and we cannot continue to rely on services.