QUOTE:
we advice that your winnings should be kept very confidential
Mother Ant was sent something similar, claiming that she'd won on the Spanish lottery - without ever having bought a ticket. How very altruistic of them.
On contacting the police, she was told that this scam involves the gullible "winner" sending an advance four-figure sum to cover "administration costs", along with their bank details. Having done so and while waiting for the "winnings" to arrive, they shouldn't mention it to anyone. This last condition would never raise suspicions, of cousre, and nor would the grammatical errors (see quote).
Don't give up the day job, I'm sorry to say, but should you require further information please send me a PM and a cheque for 5,000€ to cover administration costs.