550 trains axed in 24-hour strike today (31st July).
Previous walkouts took place last Saturday and Thursday, and the remaining strikes are scheduled on 4, 11, 18, 31 August and 1 September.
In a statement, the rail company said it was "surprised" the union had decided to call further strikes, "especially at a time when families want to be out and about enjoying the summer holidays".
"We will continue to seek a resolution and work hard to minimise any disruption to our customers."
Ticket-holders get no compensation during train strikes.
Plymouth fly-tipper brought to justice
Torbay waves goodbye to Blue Flag beaches
Woman died after oxygen supply turned off
Massive data centre could be built near Devon
Two further arrests after body found at Plymouth marina
County Council pushes tax bar to the limit
