Last year 11,414 new 4x4s were licensed in London, a rate of 951 a month. In the first four months of this year 5,772 were registered at the rate of 1,443 a month, a rise of 51 per cent. Away from London - where, arguably, 4x4s are more useful - sales rose from 66,769 in January to May last year to 78,333 over the same period this year.