I offer one room on a bed and breakfast basis and was emailed this week on the address I keep exclusively for that purpose asking to book for one week in March. They said their employer would send me a cheque for more than the required amount and I should send the excess ( their travelling allowance!) back to them. Seemed very dodgy and having done a bit of research it is indeed a scam. I have reported it to the police fraud line.
This has happened a lot in Northern Ireland .
https://www.bbc.co.uk/news/uk-northern-ireland-28327763