The following video covers safe sleep in some detail, including sleeping in slings, prams, car seats and co-sleeping. There is also a short section on safety when baby will only sleep on you. 

https://vimeo.com/689330116/6c03d37fe4

Useful links

The Lullaby Trust – Safer sleep for babies, Support for families

BASIS – Baby Sleep Information Source (basisonline.org.uk)

Slings and newborns : Rebecca Scott-pillai (rebeccascottpillai.co.uk)