They’ve had loads of time,since end of March and the Goverment couldn’t get the first app sorted,shambles for me??My next door neighbours had a holiday so self isolated for 14 days when returned,nobody made sure they did isolated not even a text?I can see the point of it but how accurate is it ? And as you say can you trust it , we will see how many get told to isolate when it isn’t necessary.... think it needs a while to see how it works ....