Aygo Occasionally Stalls When Pulling Up.

[Ambriel]

My wife's Aygo has an occasional problem in that sometimes, such as when pulling up at lights or a junction, the engine revs drop below idle and it dies. Restarts fine.

Does this ring any bells with anyone? Suggestions of what might be the cause?

Don't have a dealer for 95 miles so can't just drop in, so if it's something simple I can sort out that'd be great.

[C_U_Jimi]

Clogged air filter?

Only takes 10 minutes to check

[Ambriel]

I'll fit a new one as a precaution, but I'd have expected it to be more frequent/regular if it was just that.