NICE guidelines
COVID-19 rapid guideline: dermatological conditions treated with drugs affecting the immune response

British Association of Dermatologists
Dermatology advice regarding self isolation and immunosuppressed patients
Clinical guidelines for the management of dermatology patients remotely
Clinical guidance on managing patients with skin cancer
Guidance on managing patients on isotretinoin
Guidance on managing patients with urticaria on omalizumab
Update on occupational skin disease during the coronavirus pandemic

Other dermatology guidance
 European Academy of Dermatology and Venereology
American Academy of Dermatology