Aaaagh - I've just type a whole reply and erased it - think I pressed a button when I was aiming for capslock. Bizarre.
Anyway, here goes again.
The time of these price updates is actually 16.50 (GMT) - I think the FTSE stops trading at 16.30. A guy on the bloomberg helpdesk told me that these prices being quoted after close of market were settlement prices sent by the exchange. I'm not sure that would explain it. The price screen looks like this:
16.50.18 330/468
16.50.18 399
16.46.16 330/333
16.46.16 331.5
16.35.58 331
16.35.58 331
16.35.58 330/332
16.35.38 331
16.35.38 330/332
As you can see the very top one is the anomalous offer price. I think we agreed that that could be an intentional thing on behalf of the market maker.
I'm not sure that the bloomberg helpdesk guy's explanation of settlement prices explains it. Do you think it could be that the market maker is processing trades - like a backlog of orders he builds up and cleans up after close of business? Is that viable?
Cheers for your help - PS you need to get a b/berg terminal; mine (my work's) is my favourite toy!!