'Anchor' was a British operation by the Special Operations Executive to establish radio contact, train small resistance groups, and prepare to receive arms drops in the area around Drammen to the west of Oslo in German-occupied Norway (21 February/April 1942).
A two-man Norwegian party (T. Gulbrandsen and E. Hvaal, the radio operator who followed on 17 April) was delivered by sea. Gulbrandsen made contact with the resistance leadership in eastern Norway. He began instruction but in May was captured by the Gestapo. Hvaal was also captured soon after his arrival in Norway in April. Gulbrandsen escaped, with the help of the Gestapo, during September and returned to the UK to work for the Germans, resulting in 'Omelette'.