One in 50 Brits has set up a hidden camera to monitor a tradesman
44% say TV programmes have altered how they view plumbers and engineers
But just 30% ask for qualifications and accreditation when they hire someone
Nearly 100,000 Britons have set up a hidden camera to keep tabs on potentially troublesome tradesman, thanks in part to the influence of rogue trader TV programmes and a lack of understanding of what they should look for in hired help.  Figures from HomeServe, the home emergency specialists, find that one in 50 Brits (2%) has set up a hidden camera to monitor a tradesman left in their home - and a further 6% admit that they have considered it. But it seems that television programmes like Rogue Traders are colouring people's perceptions, with 44% saying they have changed how they view tradesmen as a result of such shows and 46% that they would not let someone work in their home unattended. And the often unfavourable impression given by TV is compounded by the public's lack of understanding of what to look for in reputable tradesmen. The HomeServe research found that the most widely-known accreditation is CORGI, which 81% of people would look for - yet this has been defunct for four years. And although more than one in two have heard of its replacement, the Gas Safe Register (53%), a fifth (19%) believe they have heard of the Plumbing Standards Agency and one in seven (13%) British Licensed Electricians - despite both being invented for the purposes of the research. Indeed, more people would ask to see the defunct CORGI accreditation (49%) than the Gas Safe Register (36%) and only three in 10 homeowners (30%) admit that they do ask for proof of qualifications or accreditation.