I would anticipate numbers being down from now on, for a year or more depending on the economy. STN has lost a number of its operators (Sky Europe, Eos, Maxjet, etc), and others have cut back, notably FR - the largest.
With increased fuel prices and recession beginning to bite, numbers are likely to be down almost everywhere, and STN will be no exception.
As for the second runway, I would not be surprised to see changes to its spec as BAA comes under the microscope of the Competition Commission, and as it tries to cut back on capital expenditure. Unless, that is, the whole airport is sold off. Then all bets will be off.