I suspect most local councils in the UK have an archaeology team and failing that there are a lot of professional consulting archaeologists - a lot (all?) large scale building works often include the need for archaeological surveys and/or remediation.

e.g. Work for what is now the Queensferry Crossing bridge uncovered a 10,000 year old home:

https://www.bbc.co.uk/news/uk-scotland-edinburgh-east-fife-2...