Today's response could be down to a number of things - Xmas, oil price, major move up already seen, lock-in expiry... or simply that the market is yet to digest the news fully.
I'm expecting further rises though coz all this good news must feed through to the price sooner or later.
Always hard to anticipate if/when a further placing will be. If it were me selling, I wouldn't do anything until after:
(1) the pre-close trading statement (in January)
(2) news from Burun South
(3) the independent revaluation of reserves (in March)
These three events could make a huge difference to the placing price, so why not wait a few more months?? Remember Bur is a gem of a company and to sell at a substantial discount to true value doesn't make good business sense to me ... nor would it to the original investors imo.