Perambulations can be found at a number of select stockists in the UK

AA Bookshop
33 Bedford Square, London WC1B 3ES

Artwords
Broadway Market, London E5 8HB

Daunt Books Hampstead
51 South End Road, London NW3 2QB

House of Books
184 West End Lane, London NW6 1SG

Highgate Bookshop
9 Highgate High Street, London N6 5JR

Isokon Gallery
Lawn Road, London NW3 2XD

I You All
48 East Dulwich Road, London SE22 9AX

Nook
153 Stoke Newington Church Street, London N16 0UH

Present and Correct
12 Bury Place, London WC1A 2JL

Provision Store
Arch 53, Ropewalk, Maltby Street, London SE1 3PA

SCP
135-139 Curtain Road, London EC2A 3BX

Tenderbooks
6 Cecil Court, London WC2N 4HE

Tokyo Bike
87–89 Tabernacle Street, London EC2A 4BA

Twentytwentyone
274-275 Upper Street, London N1 2UA

Please note, not all stockists carry the full range. 
Shops in italics carry the widest range