Hi. Yes I found a Policy through www.travelcoverquote.com. It's an AXA Policy. Think it cost around £77 for the 4 of us and also included a declared medical condition. I opted for the premium policy but they do three levels of cover. As it happens I am making a claim on the policy. We missed our connecting flight in London due to a delayed departure in Newcastle. Put the claim form in last week and just waiting to hear back from them now. BA put us up in a hotel for the night and re-arranged flights with Cathay Pacific for onward journey to Australia and we didn't need to pay out for anything. It took a whole day off our trip though which was annoying so it's this part of the trip that we're making a claim for.
The Policy also covers if airlines go bust. This is unlikely to happen with the major airlines (BA, Quantas, Emirates that kind of thing) but you can't be too careful.
I also rang up the company just to double check and they confirmed that missed/delayed departures were covered.
Hope this helps.
Kymbee