Wingtip device attachment

A wingtip device attachment arrangement 100 comprises a wingtip device 102 which is arranged to attach to a wing of an aircraft. The wingtip device comprises an aerofoil portion 108 and a connection spar 110 arranged to be received in a connection spar receiving portion 112 which may comprise a wing box 114 of the wing of an aircraft. The spar comprises a first through hole 126 in a first portion of the connection spar and a second through hole 126 in a second rearward portion of the connection spar, the second portion being rearward of the first portion with respect to a direction of flight. The first and second through holes are arranged to receive a retaining pin 120 that is to be inserted through both the first and second through holes. The pin also passes through apertures 124 in one or more wing box spars 116.