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The thespian rounded off his appearance with chunky footwear while shielding himself from the rain under an umbrella.
Rising star Anson's leading role in the programme can potentially earn him worldwide recognition, after starring in 1917, Crawl and Blackbird.
In good company: Toby Wallace (second from left), Christian Lees (pictured centre), and Jacob Slater (pictured far right) were also seen in Folkestone
The real rockers: Sex Pistols consisted of Johnny Rotten, Sid Vicious, Steve Jones, Paul Cook and Glen Matlock (the band L-R minus Glen Matlock pictured in 1978)
Wow: Anson, pictured left in character, and Johnny Rotten, pictured right, in 1976