Mark the humble sandwich's 250th birthday at celebrations in the town its inventor takes his name from.

Win tickets to the West End premiere of Ridley Scott's Prometheus.

Find out how best to spend a day wandering the cobbled streets of Rochester.

Plus, get the round up of this summer's open-air theatre season.

What's On is available inside your paid-for KM Group newspapers every week, including Kent Messenger, Medway Messenger, Gravesend Messenger, Dartford Messenger, Sittingbourne Messenger, Kentish Express, Kentish Gazette, Faversham News, East Kent Mercury, Dover Mercury and Sheerness Times Guardian.

It's also available with digital editions of those titles.

If you enjoy What's On please become a fan on Facebook or follow on Twitter.

To contact editorial please email whatsoneditor@thekmgroup.co.uk or call 01622 717880.

To advertise please call 01622 794520.

To submit a free listing please click here.