1 For further information about the data, including updates or changes, see the Explanatory Notes section of this issue and the related Appendices such as Data Quality Issues.

2 Short-term arrival movements are based on a sample and are subject to sampling error. See paragraphs 10 and 11 of the Explanatory Notes section of this issue.

3 Occasionally situations occur that necessitate breaks being applied to the trend series. For an overview of the breaks currently included in the trend series see paragraph 29 of the Explanatory Notes section of this issue.