Linus p answer to ur question about taxi pollution as you are right but we got 15 yrs rule now, most of them are coming off road now as all tx1 are gone next are tx2 which are coming off slowly, new electric taxi is out now but very pricy. My tx4 is euro 5 less pollution after 15 yrs will be off road too as mine is 2014. We getting more screwed then car driver as new levc taxi is 57k cash or lease cost you 65k in 5 yrs. It's electric and petrol but worse thing is still 15 yrs rule apply which is absolutely stupid as electric charge lasts only 70 miles and not practical if you haven't got drive to charge it.