I was due to fly to Belfast this morning but my flight has been cancelled, so has the return flight tomorrow. It looks like I should be able to get a refund on the flights. Can I expect to get my hotel cost refunded by easyjet?

Nope, thats what travel insurance is for.

Even if we booked the hotel via the easyjet website?

At this point you need to be reading the T&C’s but generally they don’t go for losses incurred.

Ring hotel, don’t tell them you can’t make it, just ask if they can change booking to a later date.

If they say no, then you can go for the sympathy approach with cancelled flights, but if you tell them upfront, it’s cash for nothing for them as they know you won’t show!

See here…
http://www.which.co.uk/consumer-rights/regulation/package-travel-regulations