12月25日 从T1到T4只能乘Heathrow Express,每隔15分钟发车。并且当天希思罗快线仅在希思罗机场各航站楼间运行。A revised inter teminal transfer service will operate every 15 minutes between all terminals from 05:00 until 23:50. (参考https://www.heathrowexpress.com/timetable-schedule/service-plans#592)