You will soon need a license from the copyright holder to take a photograph of any copyrighted object in the UK, pertinent to us that would include all modern designer furniture:
http://arstechnica.com/tech-policy/2015/12/you-may-soon-need-a-licence-to-take-photos-of-that-classic-designer-chair-you-bought/
If this were actually enforced it would be virtually impossible to sell anything MCM in the UK. Imagine having to track down Arne Jacobsen's heirs to negotiate a payment for a license to photograph the Swan chair you want to sell.
I have to imagine this law will never actually come into force, but apparently it is already done, except for deciding how long to delay implementation.
If you need any help, please contact us at – info@designaddict.com