My inlaws have just come back from New Zealand via Singapore (transit) with colds. They say the colds started before they got to Singapore so havent got Covid so won't be self isolating but undersrand if we dont want to see them for 2 weeks. I went on the 111.nhs website and did the questionnaire and it says to self isolate! I have mentioned it to them and sent them a link. Tried to call them to mention it again but they have gone out!!! Am i being neurotic or are they being naive????