Douglas Carswell didn’t fancy answering questions about Farage’s suggestion that immigrants with HIV should be banned from Britain, though not for the want of trying of the Guardian’s Nick Watt. UKIP’s new MP managed to deflect being reminded “Douglas your father was a pioneer! Your father was a pioneer in discovering aids!” by talking about Australian points systems. A party advocating a free NHS for all comers worldwide on the doorstep will lose a lot of votes…