"I'm Backing Britain" was a brief patriotic campaign, which flourished in early 1968 and was aimed at boosting the British economy. The campaign started spontaneously when five Surbiton secretaries volunteered to work an extra half-hour each day without pay to boost productivity and urged others to do the same. The invitation received an enormous response and a campaign took off spectacularly; it became a nationwide movement within a week. Trade unions were suspicious of, or even opposed to, the campaign, considering it as an attempt to extend working hours surreptitiously and to hide inefficiency by management.