Having had my 2004 SEAT Leon Cupra diesel for over 10 years and hitting just under 200,000 miles, I find myself at the stage where the engine requires replacing. It's beyond economic repair so I need to buy a new car. I'm looking to purchase something similar - another SEAT Leon, Audi A3, Volkswagen Golf or Skoda Octavia VRS Estate. Is there any reason I shouldn't go for a diesel? I have a budget of around £10,000-£12,000 and I cannot see an argument for buying a petrol over a diesel right now, but I am wary of spending that amount of money on a diesel car only to be hit by increased running costs from the government as they look to promote EVs. Is there any reason not to go down this route? Thank you.