142m, 7 pitches. A brilliant, sustained trip crossing the central section of the main cliff.
7 pitches - 5b,5a,5c,5b,5c,5c,4c. The third pitch descends the Alien chimney from the Rat Race belay. There is a trick to this involving the spike at the start of the main pitch of Positron.

M. Fowler, J. Stevenson Sep/1976

Hidden 11/Apr AltLd O/S
Hidden 10/Jun/13 AltLd rpt
Hidden 14/Apr/10 AltLd dnf
Rich Kirby 02/Apr/09 AltLd O/S

A fantastic excursion which we felt deserves E4 for the Alien chimney descent (pitch 3) and the majority of Citadels 2nd pitch (pitch 6). Led pitch 1,3,5 & 7. A wonderful day out.

ellis ?/Aug/06 AltLd O/S
with Tom Bridgeland
Hidden 30/Apr/00 AltLd
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