Madrid:

533

Members of Parliament are elected from constituencies across England. There are roughly 72,000 votes in each electoral district.

59

MPs are elected from constituencies in Scotland, with roughly 69,000 voters in each district. The SNP held 56 seats before the election.

40

MPs are elected from constituencies in Wales, with roughly 56,800 voters in each district. Welsh nationalists held three of those.

18

MPs are elected from constituencies in Northern Ireland, with roughly 66,800 voters in each district, with counting being slowest in the UK.

The slimmest of margins

The suburban constituency of Gower, near Swansea in Wales, was the tightest race across the United Kingdom in the 2015 general election.

There, Conservative MP Byron Davies won the seat for his first time with a margin of just 27 votes.

He was against Brexit and previously was a police officer for the London Metropolitan Police.

Size does matter

The smallest constituency in the United Kingdom is just .735 square kilometres in size. With about 68,000 registered voters, Islington North has slightly fewer voters than the UK average for each constituency.

Focused around the Camden Road and Seven Sisters area in northeast central London, it also includes the site of Holloway, a notorious prison, and Highbury, the former ground for Arsenal Football Club. That’s why the local Member of Parliament is such a fan — Labour leader Jeremy Corbyn — and he has held the seat since 1983.

Speed bonnie boat …

The largest constituency by area in the UK is the remote Scottish district of Ross, Skye and Lochaber. It covers an area of 12,000 square kilometres, mostly water. That’s why weather conditions can interfere with voting and with the collection of ballot boxes from remote island communities.

First and foremost

Those who watch the minutiae of general elections in the UK will be keeping a close on the constituency of Sunderland, in the northeast, when polls close at 10pm local time.

The city, site of a Nissan car production plant, consistently holds the record for being the first to report its official election results.

There, local government staff, aided by university students, practise getting ballot boxes to the counting centre, emptied and counted, in under an hour. And they are favourite to get it done first time around too despite stiff opposition from the Yorkshire riding of Harrowgate.