My immediate reaction was to query with a contact at the company if this was a real email or a scam attempt as I have seen some very realistic change of bank detail scam emails sent to customers of mine.
If a supplier asks you to pay to a different bank account, always double check that it really is them, as it would be you who is out of pocket if it isn't!
Slarti the paranoid.
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Title adjusted at OP's request (chas49)
Title adjusted at OP's request (chas49)