1) Government report states problems of cost for tackling climate change with renewables (paragraph 5.2, The UK Renewable Energy Strategy, July 2009):
"The new ... measures ... in the UK Low Carbon Transition Plan [includes not just the Renewable Energy Strategy but also a number of other policies] will add on average an additional 6% to today’s household energy bills by 2020. Including all previously announced climate policies will increase this ﬁgure to 8%. The Government estimates that, taken in isolation, the measures included in this Renewable Energy Strategy would increase household electricity bills by 15% and gas bills by 23% by 2020 compared to what they would have been without these measures. The overall bill impacts of the UK Low Transition Plan are considerably lower primarily because they include policies for greater energy efﬁciency, and hence reduce energy bills."
2) Any massive structure affects the environment - note just because it is in the sea does not make the impact any less.
3) Climate changes future weather, but this is expected to increase strength/area of wind power in UK.
4) Any 'unused land' has a biodiversity/habitat conservation value, nutrient/carbon storage value, potential use value (especially revelant in UK as housing, road, industrial developers and those of us who like to 'see' unused land e.g. conservationists fight over our 'spare' land).
5) Countries will never work together to share energy resources until there is one sole goverment, and one international military force.
6) High Voltage Direct Transmission lines/cables (I think what might have been meant earlier by 'interconnectors') are cool, but only get cost-effective over quite large distances, bigger if I remember correctly than the distance from Glasgow to London.
7) Batteries in every home? Nice for those who can afford not to live in rented flats/tiny shitholes.
8) Vehicle-to-Grid power may allow for greater wind penetration (Kempton and Tomic, 2005 and Lund, 2007). I'm working on that but you'll have to wait a few years before I can tell you anything about the UK specifically. Quick explanation: smart grid, plug-in vehicle types, time charging with low peak demand/high electricity available. Best support comes from companies with vehicles run on shift patterns - can fulfill role of otherwise expensive spinning reserve generators that switch on/off with wind intermittency. Role of Combined Heat and Power emphasised by Lund for Denmark.
9) But elec cars still pose same problem as home batteries, and distributed home generation e.g. solar thermal/voltaics or small scale wind: feed in tarrifs mean money for those able to afford these new tech, or rich enough to own a home big enough (or with it's own roof - e.g. only top floor of a block of flats could do photothermal/voltaic) to situate these new tech e.g. driveways, garages for cars.
10) You might like to point out as another flaw in reporting from the BBC/gov. on this: They intend that home generation through photothermal/voltaic etc. are given feed in tarrifs, and that income from these is free of income tax (box 3.2, The UK Renewable Energy Strategy, July 2009). Bare in mind my last paragraph, and ponder this: the medium-rich to rich get richer, the poor stay as they are and the gap widens.
11) No single solution is an answer. We need solutions are varied and adaptable, and suited to individual areas/peoples/weather/whatever, as the tropical rainforest is suggested to have life. Bio, or should I say, techno-diversity is the key, as is an attitude that sees all people, regardless their status or profession, as deserving of equal environmental health (note post by Anonymous Coward about £21k not deemed enough for a family to live on).
12) BBC never wants to comment on the fact that the number of people in this country needs to be no more than it is, less babies, more emmigration, less immigration, whatever. Then spread us out a bit more nicely, can I have a garden for when I have kiddies, please? That would be nice. The BBC reports on a mythical UK where everybody seems to have a house and a garden, and a car, and can afford holidays abroad. If that's not propaganda, I don't know what is.