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Six train services affected by hot weather today

Several fast trains from London Paddington have been cancelled by First Great Western today, after Network Rail imposed speed restrictions to prevent track from buckling in the heat.

Six services out of 1,520 running today have been affected so far.

A spokesman said: "First Great Western is advising passengers that due to the anticipated hot weather Network Rail is to impose a speed restriction in the London Thames Valley area to protect track points on Tuesday 30 June.

"As a result there will be no fast trains between between London Paddington and Bourne End or Henley-on-Thames from 12:00 until 20:00."

Network has told train companies to slow down at vulnerable locations as tracks could buckle.

Extreme heat could disrupt trains, Network Rail warns

Tracks can buckle in intense heat Credit: Chris Radburn / PA Archive

With temperatures set to soar into the mid 30s this week, train companies are warning that the heat could interfere with Britain's rail network.

Commuters are being told to check their journeys ahead of time for ristricted services, as the heat is predicted to get so fierce that it could buckle rails.

"As rails are made out of steel, they expand as they heat up and are subject to strong compression," Network Rail said on its website.

"This expansion has to be managed to reduce the risk of track buckling. If the track does buckle, the line must be closed and the track repaired before services can resume, causing considerable disruption."

First Great Western services in the Thames Valley area will be subject to speed restrictions from midday to 8pm today - meaning there will be fewer fast trains.

Network Rail failure puts vital improvements at risk

Network Rail today announced that its plans to improve Britain's rail system were unachievable, and now many major projects are on hold, or even cancelled.

ITV News correspondent Romilly Weeks reports:

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