n1) IKEA - One of the most well-known and largest flat pack furniture companies in the UK, IKEA offers a wide range of affordable and stylish furniture options. They also provide assembly services for an additional fee.

n2) John Lewis - A popular department store that offers a variety of flat pack furniture options from different brands. They also offer assembly services for an additional charge.

n3) Wayfair - An online retailer that offers a vast selection of flat pack furniture from a variety of brands. They also have a network of independent assembly services that customers can hire for their furniture assembly needs.

n4) Handymen In London - This is a local handyman service in London that specializes in flat pack furniture assembly. They have experienced and trained professionals who can quickly and efficiently assemble furniture from various brands.

n5) <a href="https://flatpackamigos.co.uk">Flat Pack Amigos</a> - A nationwide flat pack furniture assembly company with a team of experienced assemblers. They offer competitive prices and have a high customer satisfaction rate. They also provide additional services such as furniture disassembly and removal.