Talk about a contrast: one week on from the dramatic British Grand Prix being played out at Silverstone in front of a crowd of 120,000, this weekend it is the turn of grass-roots motorsport to star at the Northamptonshire circuit.

Actually, there's a common link between the two events – the volunteer marshals that make the British Grand Prix tick. You know, the ones who bravely ran onto the circuit to recover all those flapping Pirelli tyre carcasses during last week's GP.

Volunteers and first-time competitors will be the focus of Go Motorsport Live at Silverstone this Sunday. Curated by the Motor Sports Association, it is an annual celebration of cheap and accessible ways to get into the sport. The event aims to dispel the notion that you need a EuroMillions win to fund any kind of motorsport involvement, and also to explode the myth that the sport is a closed shop that's impossible to enter.

In fact (and I speak from a modest amount of club rally co-driving experience, and from having marshalled on a wet and windy Welsh hillside) at the grass-roots level the sport is as friendly and accessible as you could wish for. There's a great sense of camaraderie on club events, and even the leading competitors are happy to dispense sage advice (at least, up to the point you start beating them).