@steampowered- We arranged travel insurance independently from our flights. Here's their original response:
Thank you for registering your intention to claim under your CoverForYou Travel Insurance Policy.
Having carefully reviewed your claim we would refer you to the terms and conditions of your policy;
Section E1 – Travel delay What you are covered for under section E1. We will pay up to the amount shown in the table of benefits if your final international departure from or to the United Kingdom by aircraft, sea vessel, coach or train is delayed for more than 12 hours due to poor weather conditions (but not including weather conditions defined as natural catastrophe), a strike, industrial action or mechanical breakdown. We will pay a benefit for each complete 12 hour period that you are delayed, as long as you eventually go on the holiday or eventually return to the United Kingdom following your holiday.
Regretfully the reason for your delay in departure is not one for which cover is provided, and although with sympathise with your situation, we cannot on this occasion be of any assistance.