Welcome to the forum.
Short answer, no need. Chickens are like duvets, and believe it or not most will do perfectly fine in the UK climate without a coop at all. Even on the darkest frostiest of nights. A coop is a luxury item we afford to protect the chickens from overnight predators, and to offer some shelter from the elements. A lot of people who don't get problems with foxy (our Scottish islands for example) don't bother with a coop, or don't especially exercise getting them in at night. They're happy to roost up a tree regardless of elements. As long as they aren't sat in a howling draught, and have a roof, they'll be spot on.
Giving power to politicians is like giving whiskey and car keys to a teenage boy - P. J. O'Rourke (thanks Jessie)
It's amazing that people can believe everything is predestined but they still look both ways when crossing the road - Stephen Hawking
1 Wife, 3 children, 1 Staffie Bitch (RIP Marley), 1 Chi-Chi, 1 Tuxedo Cat, 1 part Maine Coon cat, male bearded dragon, Horsefield Tortoise, 2 White Silkies, 1 Frizzle Pekin, 1 CLB, 1 Appenzeller Spitzhauben Cockerel, 1 blue laced Wyandotte, 3 Appenzeller x Wynadotte pullets, 1 Call drake, 3 khaki Campbell ducks, 4 (2 male 2 female?) Aylesbury x Campbells, a breeding colony of Dubia cockroaches.
And a lot of Ibuprofen.