Central Line shut for two weeks?

According to the BBC, the Central Line is to remain closed for at least two weeks for safety checks on the trains after last week's derailment.

Despite much media hysteria, nobody was actually killed or even seriously hurt when a motor fell off a coach causing the rear part of the train to scrape along the sides of the tunnel.

Why is it going to take two whole weeks to check the trains are 'safe'? I'm assuming the dreaded Health and Safety Executive is behind this nonsense, although it might be London Underground protecting themselves from lawsuits. All I can say is the nobody has factored in the number of additional road deaths caused by one of London's major transport arteries being out of action for so long.