By Dave Burke New post-Brexit border checks which come into effect today will lead to increased food prices, ministers have been warned. Millions of products face document checks coming into the UK for the first time, with critics branding the plans “horrendous and chaotic”. It is forecast that the new red tape will cost firms £330million a year – costs that are expected to be passed to consumers. MPs heard this means an extra £8 a month through what is dubbed a ” Brexit border tax”. The new requirements apply to animal and plant products coming from the EU, with importers required to provide …