https://www.bbc.co.uk/news/business-60902583
This isn't the first time Cadbury has shrunk the size of its products.
Cadbury has shrunk the size of its Dairy Milk sharing bars by 10%, but will not reduce the price for customers.
Parent company Mondelez blamed costs associated with the production of its chocolate spiking, as it reduced the bars' size from 200g to 180g.
They are still typically being sold at £2 despite the downsize.
This isn't the first time Cadbury has shrunk the size of its products.