You guys are all wrong. There is no blanket automatic acceptance of contracts if you ignore them in the UK.
There IS automatic acceptance of updates to previously signed contracts, ONLY if the original signed contract contains "terms permitting the employer to make changes from time to time" without your permission.
That is completely different than automatic acceptance of all contracts that are left unsigned and ignored.
https://worksmart.org.uk/work-rights/pay-and-contracts/contr...