Yes GCE is A level
The ticks I believe relate to raw score.
Raw score to UMS can then be calculated roughly by looking at the Grade Boundaries which are published by the exam boards which show you the raw score cut off marks for each grade boundary, then the UMS is allocated so that 90=A8, 80=A, 70=B etc.
My only question is does the clerical check count up the ticks.
The guidelines say it checks all questions have been marked and the totals added up correctly. In our case all pages were marked with lots of ticks
, but when the score for one question was transferred to the front page then only the ticks from one page on which the question was answered were entered and not those on another page onto which the answer spread.