Coterie, Capsule, Liberty, Cabana and Woman were among the trade shows taking place this week.
Hamnett implored fashion customers to take a stand, and urge brands to be more responsible and sustainable, during a talk at Liberty in London.
A booming stock market and updated merchandise choices led to the positive outlook.
Hudson Jeans will anchor a new denim section named Indigo.
British police found no evidence of gunfire after evacuating the Oxford Circus and Bond Street tube stations on Black Friday.
H&M’s new concept store will stock the label’s own range of minimalist Scandi-inspired clothing as well as a selection of shoes, accessories and homeware.
The Dermalogica Skin Health School will host a range of interactive sessions featuring advice from beauty industry professionals.
Mytheresa, Liberty, Net-a-porter among the retailers participating.
Called Continuum, the store will launch on Thursday with around 25 brands.