Twins are also lousy in bad weather.
you cant see out of them, inadvertent IMC is considered normal.
they have less performance margin.
UK has twins littering the countryside also.
there are more singles flying more hours with less 'capability' and less qualified pilots crashing less in the UK. (leaving the NS out of it)
Engine duplication is a dim solution, attractive to people who know nothing at all about helicopters (fact)
THERE IS SIMPLY NO JUSTIFICATION TO MAKE ENGINE DISCRIMINATORY LEGISLATION.
it would be like legislation that people must make decisions according to horoscopes. Science! we are supposed to have moved forward.