dl.dropbox.com/u/20815047/TSCOdaily14_12_12.gif
Here's the gap on the above chart. IMHO it will get filled but maybe not before a test of the 351p recent high. My reasons for this are that the 2 types of gap which often get left are runaway gaps and breakaway gaps. In this case, while it has gapped up over a short term resistance, it's not a major one and it hasn't continued up in a fashion which supports the momentum required by either of these two gap types.
Two simple strategies for me here:
1) If it returns to the gap from here (before moving up) then I'd go long with a stop below the low at 320.2p (same candle the gap came from) and then close my long at 350p near the 351p resistance or;
2) If it continues up to test 351p then I'd short there and look to close and reverse to a long position from the gap using the stop detailed above in 1).
If I was to guess then I'd say that 2) was more likely to happen than 1), but then again, some people always favour The Third Way