AFV demand continued to rise, up 36.9% to 8,244 registrations, while petrol models enjoyed a more modest growth of 2.7%.
Demand from businesses and fleet orders dropped 26.8% and 13% respectively last month.
"With the widespread uncertainty and general confusion surrounding diesels and the potential for charges and restrictions in London and other major cities, a distinct lack of buyer confidence is the primary reason for this dramatic drop".
People are buying fewer diesel cars as petrol and alternative fuel cars grow in popularity, according to new industry figures.
Kamworor holds off fellow Kenyan Kipsang to win NYC Marathon
Behind her, but fading fast, Mary Keitany was chasing history, too: The 35-year-old Kenyan had won this race three times in a row. In the wheelchair event, the Swiss dominated with Manuela Schar tops among women and Marcel Hug finishing first among the men.
As a result of the seemingly terminal decline in diesel vehicle registrations, the SMMT is calling for the government to reassure buyers that there will be no bans, charges or other restrictions place on the latest diesel cars in the future.
The SMMT urged the government to use this month's autumn budget to restore stability to the market and encourage the purchase of the latest low emission vehicles.
Demand in new cars crashed by -12.2 per cent over the month as motorist's confidence in new cars declined as the vilification of diesel cars continues.
Year to date registrations decrease -4.6%. 24,968 new LCVs joined British roads in October, a -7.4 per cent fall compared with the same month past year. This aligns with SMMT's latest forecast for 2017, with the market expected to end the year on 2.565 million units - a 4.7% decline.
Trump says he'll meet Putin to talk North Korea
Japan is the first stop on the president's Asian tour, which will take him to South Korea, China, Vietnam, and the Philippines. Abe told reporters after the golf session that the two could talk frankly in a relaxed atmosphere while out on the course.
In what was the seventh consecutive month of falling registrations, 158,192 new cars hit the road.
Overall, fewer new cars are being registered.
Vehicle sales are also likely to be hampered by mounting pressure to restrict auto finance deals and unsecured consumer credit, Archer said, with the Bank of England having shown mounting concern and called for a more responsible approach, particularly due to concerns over the resale value of cars at the end of Personal Contract Purchase (PCP) deals. We must also remember Brexit has already had an impact on the United Kingdom vehicle market through the fundamental shift in the exchange rate which is impacting auto prices, making the market correction even more understandable.
"It's also worth noting that although we see a continued fall in demand for diesel, this remains an appropriate fuel choice for many drivers". The latter - which accounts for hybrid and electric vehicles - now accounts for 5.2% of the market overall.
American woman, jailed for calling Mugabe a 'sick man
Zimbabwe authorities have said that O'Donovan was the one who wrote them because they came from her IP address. Earlier this year, she presented a talk at a digital culture conference on "How Zimbabweans Rebel Online".