1st time I have graced the focus room on pf a question to the focus owners on site if I may?

My girls car is a mk 1 focus 5 door 1.8 zetec on a 51 plate, the reversing light has gone and I wish to change the bulb, having looked at the light unit I can't see any screws to remove it and change the bulb

how is this done please? many thanks in advance


Luciano