Well going by the schedule the Bull Terriers are on quite early. Judging starts at 9am so if you wanted to see them you would prob have to be there about 9am as depending on how many are entered in the breeds before the Bull Terriers which are Airedales, Am Staffs and Border Terriers, they might be on fairly soon after 9am. I would say to be there for 9.30am at latest just in case they judge the others quite quickly.
I might know more before the show if they release how many are entered in each breed.
Hope this helps