Immigrationboards.com

calculating continuous period in the UK @ Page 20 wrote:Absences must be connected to the applicant’s sponsored or permitted employment, or the permitted economic activity being carried out in the UK, for example, business trips or short secondments. This also includes, any paid annual leave which must be assessed on a case by case basis and must be in line with the UK statutory annual leave entitlement

Evidence in the form of a letter from the employer setting out the reasons for the absences, including annual leave, must be provided. Tier 1 (General) applicants who are self employed or in business must provide a letter of explanation of their business-related absences, including any time spent on holiday outside the UK.

calculating continuous period in the UK @ Page 21 wrote:For the Tier 1 (Investor), Tier 1 (Entrepreneur), Tier 1 (Exceptional talent) and highly skilled migrant (applying under Appendix S of the rules) categories there is no requirement to give a reason for absences if they do not exceed 180 days in any of the five, four, three or two consecutive 12 month periods of the continuous period, depending on the category, counted backwards from the date of application for indefinite leave to remain (ILR)