Construction Cert works exclusively with individuals and companies in the construction industry. Their experienced team will take the hassle out of booking your construction tests and courses. You let them know what tests you need to book and when you need to take them... and they'll do the rest. Over 250 venues across the UK available for construction courses and tests. Easy Online Booking. Exclusive 20% discount available on CITB Health, Safety and Environment Tests for all Square Construction Users.