the reason the sp is @ 70p is because the deals not done yet, if it was near the buy out figure reported everyone would just sell out now! doesn't mean its more likely to be off than on, sound like "The Streets".
Since the announcement, as I've said before, won't come until next week, as reported, then I wouldn't worry about what happens this week. I've already stated last week that the sp will jump between 67-72p until the deal is done, or not as the case may be.
anyway, worst case, deals off, sp falls on news to 55-60p, then retraces and settles around 60-65p. bought @67p anyway so no worries. Company is doing pretty well on its own, but HCC are having 200m+ hard cash waved infront of their eyes. why wait another 4-5 years when you can have jam today!