miss train due to airport strike in Heathrow

Hi ,

Today, I arrived in Heathrow Airport in London but there is strike at the airport. I arrive at 430pm but only able to exit customs at 8pm. I rush to King's Cross Station to catch up the 9pm scheduled train to Newcastle. but unfortunately the train is left , because we are late.

Our actual schedule for the eurail pass:

1.My daughters bought tickets schedule at 9am from Newcastle to London in order to pick us up to Newcastle.

2. My wife and I have booked the train tickets schedule at 9pm to Newcastle. But due to Airport strike, we are unable to catch up the train on time. Therefore, I try to cancel the pass, but I can't.

Now 4 of us are staying overnight at London St Pancreas station due to the unforseen incident. 

I would like to claim for the tickets. Any advice would be great.

Thank you. Looking forward to your reply.

Kim Loong