Who, what, why: What difference would double summertime make to you?

Maps showing double summertime

A proposal to move the nation's clocks forward by one hour to so-called "double summertime" will be published this week. So what difference would it make to sunrise and sunset in towns and cities across the UK?

Prime Minister David Cameron has said any plans to give the UK brighter and longer evenings will only become a reality if it's clear that the country is behind it.

But support for the move, which would make mornings darker, may depend upon where people are.

If you live in London, then sunset would be at 2222 on 21 June, which is the longest day of the year. But in the winter solstice, on 21 December, it would not be fully light until sunrise at 0904.

It would be a very different experience if you lived in Thurso in the Scottish Highlands, where under "double summertime", the sun would not set until 2327 in mid-summer but it would not rise until 1003 in mid-winter, a long time after children had started school lessons.

So how would it affect you? Seven cities are mapped above, and below, there are 10 more cities around the UK with the new sunrise and sunset times on the longest and shortest days of the year.

How double summertime would affect you

Place 21 June 2011 21 Dec 2011

Source: HM Nautical Almanac Office

Bangor, Gwynedd

Sunrise 0549

Sunset 2248

Sunrise 0929

Sunset 1700

Birmingham

Sunrise 0544

Sunset 2234

Sunrise 0916

Sunset 1655

Bristol

Sunrise 0553

Sunset 2231

Sunrise 0913

Sunset 1703

Glasgow

Sunrise 0531

Sunset 2307

Sunrise 0946

Sunset 1644

Hull

Sunrise 0530

Sunset 2236

Sunrise 0917

Sunset 1642

Leicester

Sunrise 0540

Sunset 2232

Sunrise 0913

Sunset 1651

Londonderry

Sunrise 0550

Sunset 2312

Sunrise 0952

Sunset 1702

Newcastle-upon-Tyne

Sunrise 0527

Sunset 2249

Sunrise 0929

Sunset 1639

Norwich

Sunrise 0531

Sunset 2222

Sunrise 0904

Sunset 1642

Portsmouth

Sunrise 0551

Sunset 2221

Sunrise 0904

Sunset 1701

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