White-letter Hairstreaks in Wandsworth, Lambeth and Southwark Summary Detailed surveys of the presence of elm trees and the White-letter Hairstreak butterfly have shown that it is more widespread in the Inner London Boroughs of Wandsworth, Lambeth and Southwark than previously thought. It is present throughout the boroughs, though never in very high numbers. It is difficult to spot, and probably even now remains under-recorded. Introduction The Inner London Boroughs of Wandsworth, Lambeth and Southwark fall within the area of the Surrey & SW London Branch of Butterfly Conservation (part of the old Vice County 17 used for recording purposes). Not much is known about the distribution and abundance of the White-letter Hairstreak in these boroughs. It is an elusive butterfly, spending most of the time at the top of elm trees (its larval food plant) and only flying when it is sunny and still. It is rarely present in large numbers, and only occasionally comes down to lowe