Bomber Command raid - night of 20/21 September 1940

CHANNEL PORTS, GERMANY
172 aircraft of all types. Most of the effort was to Channel ports but small raids on German railways and canals, French airfields and minelaying at St-Nazaire. 1 Wellington lost.

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18 Blenheims on sea and coastal sweeps. 9 aircraft bombed Belgian ports. No losses.

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CHANNEL PORTS
92 aircraft. 91 reported bombing. No losses.