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I think that the difference between "would have been" or "has been" invested is a somewhat moot point.
As to where, or what, the money was invested in - the person I spoke to did not have the file "to hand" - quite understandably - considering the time-lapse, but I am assured it will be retrieved from the archives and looked into this week.
We will then be told of it's current value, as it is well past the due date for payment.
The only thing I agree is strange - is why we were never contacted again regarding this, after a period of time.