Contribution
My Lords, I do not believe that the Bill should be too specific on the investment targets of GBE. As I said in an earlier group, I believe that GBE should remain flexible and fleet of foot, adapting itself over the years to the development of science and changes in the marketplace.
Nevertheless, there is no harm in us discussing where we think some of the current opportunities lie. In that context, and in the context of the amendments in this group, I will touch on both heat pumps and tidal energy. Unfortunately, it was not clear from reading the script that the amendments from the noble Lord, Lord Naseby, referred to hydrogen. Had I known this, I would definitely have been supporting his amendments, because I am very keen on hydrogen. It has a crucial part to play in our energy infrastructure, as a storage of intermittent power—as the noble Lord himself mentioned—as well as in the making of steel and in transport. Hydrogen fuel cell cars have a range of more than 1,000 miles. Hydrogen is a really important part of our infrastructure. As I said at Second Reading, I hope that GBE will support the hydrogen industry.
I turn now to heat pumps. Heating and hot water make up around 40% of the UK’s energy consumption and nearly one-third of our greenhouse gas emissions. I see a role for GBE not so much in individual domestic heat pumps but in community heat pumps—particularly where, to coin a phrase, we can use the heat under our feet. Many major population centres in the UK are above, or adjacent to, hot, sedimentary aquifers at, say, 500 to 2,000 metres depth, with temperatures ranging from 25 to 60 degrees and higher. These, combined with an at-scale community heat pump, have huge potential to produce heat for hundreds of thousands of homes, factories, hospitals and greenhouses. In Holland, they hope to meet 23% of their heat demand by 2050 using geothermal heat.
We have geothermal resources in the UK; we have the heat beneath our feet. We also have the drilling skills left over from oil and gas explorations to use in this nascent industry. The industry is poised to deliver growth, renewable heat and employment. It just needs a small amount of government focus and pump priming.
I turn to tidal energy and the amendment tabled by the noble Lord, Lord Alton. I strongly believe that it is imperative for the UK to play to its strengths in the whole energy field. One of its real strengths is its range of tides. While in Gibraltar, for instance, the tidal range is only about one metre, in the Solway Firth it can be eight metres or, in the Bristol Channel, 15 metres- plus. We also have tidal races around our shores and between our islands which flow at great speed and with considerable power.
Of course, tidal power is classed as intermittent, but it is guaranteed and predictable. We know now how much power we can produce from a given site between the hours of 6 pm and 7 pm on today’s date in 2124 because, if we build, say, a tidal lagoon now, we know it will still be producing electricity almost for free in more than 100 years’ time.
We have tidal races in our firths and between our islands but, to me, the most compelling solution for harnessing our tidal power are large, offshore tidal lagoons. Any site with a depth of between five and 10 metres, and a tidal range in excess of five metres, can produce guaranteed power. They are better than a barrage across a bay because you can have turbines all round, not just on one side. This means they are almost half the price per output of power. They can be any shape, with curves in any direction that can follow the required underwater contours to produce maximum return on investment. There are about 20 ideal sites around the UK coastline.
I come from southern England, as compared to the noble Lord, Lord Alton, and the other side of the channel from the noble Lord, Lord Wigley. If noble Lords look up, they might be able to imagine a wall of water the height of this Chamber and several miles long. This is the sort of power that the Severn Estuary can produce four times a day. One lagoon in Bridgwater Bay alone—right next door to Hinkley Point, with its connections to the grid—could produce 1,900 megawatts. These lagoons do not have to be shut down for repairs. If a turbine—one of 20 or 30—needs servicing, it is lifted out for maintenance, while the rest just keep on turning.
As opposed to a barrage across an estuary, these lagoons do not upset shipping traffic in any serious way, because they sit at the side of shipping channels in the shallow waters. Furthermore, their environmental effect makes only peripheral difference to the course of the tide, migratory fish, wading birds and so on. They have the support of most environmental NGOs. There are numerous sites for these lagoons, from the north to the south of the UK. There is a seven-hour tidal difference between Bristol and Solway. If the tides are used on both flood and ebb, this gives an almost consistent baseload of power for England—and that is before we tap into some of the Scottish tidal ranges. Tidal lagoons as a whole could provide three times the capacity of Hinkley Point. We must play to our strengths. Tidal power is our natural advantage and I believe it would be well worth the focus of GBE.