SCARBOROUGH — British folk rockers Mumford & Sons will do a free performance Aug. 3 at the Scarborough Bull Moose music store on Payne Road.

The time of the free in-store performance is yet to be determined, according to a statement put out by Bull Moose Friday.

A limited number of people can attend the free show by pre-ordering the new Mumford & Sons album, “Babel,” at any Bull Moose store starting on Tuesday, Details are available at

www.bullmoose.com.

Mumford & Sons will also perform on Portland’s Eastern Promenade on Aug. 4. More information can be found at

http://www.gentlemenoftheroad.com.

Tickets for that show are $69.