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The local train line have advised not to travel today (Tuesday 19 July) on services heading in and out of London from the north as a result of the extreme temperatures.
They issued this advice:
"London Northwestern Railway services will be very limited and disrupted in and out of London as a result of the extreme heat impacting rails and overhead wire systems for the second day in succession.
Tickets for travel on Tuesday can be used on Wednesday (20th) or Thursday (21st) and if a journey has been disrupted by the weather customers may be entitled to a refund.
Further information is available at: Heat Related Timetable Amendments: Mon 18 and Tues 19 July | LNR | London Northwestern Railway"