I received a very prompt response from my "dear friend" van Oosten today.
It seems, funnily enough, that he is unable to send me £1000. Yet he kindly notes that my proposition is as good as his.
I feel mine was better, as I would have been in profit by £1000; rather than having my bank account raided by this crook.
Your proposition is as good as mine but I don't have access to the said safe unless somebody like you can come forward for its claim as next of kin to the deceased fellow.
Thanks again for your precious time.