The British election campaign of 1754 featured an issue summarized in the slogan "Give us our 11 days!" What was the issue?

The eleven days referred to here are the ‘lost’ 11 days of September 1752, skipped when Britain changed over from the Julian calendar to the Gregorian calendar, bringing England into line with most of Europe.

Claims of civil unrest and rioters demanding 'Give us our eleven days' may have arisen through a misinterpretation of a contemporary painting by William Hogarth (pictured in the question). His 1755 painting ""An Election Entertainment” refers to the elections of 1754 and depicts a tavern dinner organised by Whig candidates. A stolen Tory campaign banner with the slogan, 'Give us our Eleven Days' can be seen lower right (on the black banner on the floor under the seated gentleman’s foot, seen in this enlargement: http://tinyurl.com/p3oldbr ). The Tories can be seen outside the window, demonstrating.

The changing of the calendar was indeed one of the issues debated in the election campaign of 1754 between the Whigs and the Tories. It is also true that when the British government decided to alter the calendar and skip these 11 days, many people mistakenly believed that their lives would be shortened by 11 days. People were also unhappy and suspicious at the moving of saint's days and holy days, including the date of Easter. Many people also objected to the imposition of what they saw as a 'popish' calendar. However, most historians now believe that the protests never happened.