The same happened to me, we were due to fly to Tenerife and cruise round the Canaries for my birthday in November. I answered yes to a question which actually had a few symptoms included, but I only had one, immediately our cruise was cancelled. There is no where on the form to add any relevant information or no contact number to speak to anyone about it, just instantly cancelled. I rang P&O straight away and was told there was nothing they could do about it, no FCC or change of date and to claim on holiday insurance, this is disgusting when they are the ones who’ve cancelled. I’ve emailed to complain about the form being unfit for purpose and the unfairness of having to claim on my insurance but alas have had no reply.