This is from an email I got from Amazon recently.
Dear Seller,
We wanted to update you on some changes the Government has introduced in the UK.
This spring, the Government brought in a 2% Digital Services Tax (“DST”) in the UK which will impact fee rates on Amazon UK. While the legislation was being passed, we continued our discussions with Government to encourage them to take an approach that would not impact our Selling Partners and absorbed the increase.
Now that the legislation has passed, we wanted to let you know we will be increasing Referral fees, Fulfilment by Amazon (FBA) fees, monthly FBA Storage fees and Multichannel Fulfilment (MCF) fees by 2% for items sold in the UK to reflect this additional cost. We will not apply the increased charges retroactively, but starting 1 September, 2020, the above fee types will increase.
For example, on an item for which the referral fee on Amazon.co.uk is currently 15.0%, you will pay a fee of 15.3%, and for a parcel with a current UK rate of £2.27 (standard parcel ≤0.5kg), you will pay a fee of £2.32 starting 1 September, 2020.
For more information about these upcoming changes, including fee definitions, examples and FAQs, refer to our Help page:
https://sellercentraleurope.amazon.com/gp/help/G366DPWD5P5QFDJP.