This afternoon there was a crash at Plymouth Station resulting in some injuries. It appears that a Class 43 and a Class 150 hit each other head-on at slow speed at one of the platforms. The front of the HST was badly damaged as was the front of the Class 150. First assessment looks like either a signalling or point failure. Will let you know any further news as and when I get it.
Plymouth 'low impact' train crash leaves 18 injured - BBC News

The nature of this incident means that my sources on the ground, who will be closely involved, are unable to make comment other than to confirm the incident.

It is under investigation.  Numerous injuries among passengers were recorded as many were standing ready to alight from the arriving train.  Most public reports state that a moving train hit a stationary one and not that two moving trains met head-on.  I am of course open to correction as events unfold.

The collision occurred in platform 6 between a class 150 Sprinter unit and a High Speed Train power car.  Both have sustained moderate damage despite GWR stating the incident was a "low-impact collision".  Speed would have been very slow and perhaps below 5mph.

I have just been provided with some train details.

The HST was stopped in platform 6 and therefore this was not a head-on collision between two moving trains.  It was struck "firmly" but at low speed by the arriving Sprinter from Penzance.



The HST was due to work the 15.42 to London Paddington which was therefore cancelled.  It had arrived some 22 minutes early from Laira depot, nothing wrong with that at all as it's not a service train, and as the image shows the Penzance local train was due to arrive at the same platform no doubt to facilitate ease of connections.  The Sprinter was due to follow the HST as a stopping train to Exeter; that was also cancelled.

Permissive working does exist at Plymouth allowing more than one train into the same platform.  It isn't used a great deal as I understand it but on some occasions such a move as this obviates a need to a large number of passengers to trek across via the subway to make a connection.

Post edited as further material came to hand.