Prestigious mechanical and public health works contracts were secured at fifteen Asda stores across the UK over a 10 year period. Priory installed AC known as ‘Hot Spot Cooling’ and were one of a couple of mechanical contractors selected to carry out the works. Works involved the lifting of extremely large air handling units with separate condensers onto purpose made support systems on the roof. We also carried out distribution ductwork at high level within stores that were installed with swirl diffusers. What made these projects particularly challenging was that the majority of all works had to be carried out at night when the stores were closed!