They've been round to my house twice, once earlier this year with a questionnaire, and then again a few weeks ago with some sort of (rather vague) photofit. I do appreciate the fact that they are trying to pursue this and it's certainly good to see them out an about on the streets doing their job, but I'd agree with some of the earlier comments - it all seemed a little on the unprofessional side! Whilst both times, they did have a form of ID with them and were friendly and polite, neither of the officers actually carried business cards or telephone numbers for me to check whether it was a genuine police enquiry. They genuinely seemed surprised that someone might be suspicious when opening their door and being presented with a series of questions. Hopefully the enquiries were fruitful and not just another "end of tax year, let's get them out on the road" type of campaign.