The 400+ participants weren't put off by the weather (Image: Jeff Moore/PA Wire)

In fact, many come prepared with waterproof ponchos (Image: Jeff Moore/PA Wire)

The veteran cars trundled past London landmarks such as Westminster Bridge and Big Ben (Image: Jeff Moore/PA Wire)

Many of the cars date back more than a century, with some even produced in the 1800s (Image: Jeff Moore/PA Wire)

It's a long-observed tradition to wear outfits reflecting the era (Image: Jeff Moore/PA Wire)

Regardless of the mode of transport (Image: Jeff Moore/PA Wire)

The Run looks like a great way to spend a Sunday morning (Image: Gareth Fuller/PA Wire)

See Full Page