Will enters the nursing home disguised as a nursing sister and has share a room with a nurse who starts to undress ready for bed. she puts a nightdress on over a slip., puts her hand through the neck to slip the shoulder straps off, gives a wriggle to shed the slip but as it drops it's obvious that pt's just been dropped from her front rather tan if it had been worn.
When the bath chair tips up at the end of the car case there are castor wheels on the bottom that are clearly visible.
In the car chase from Claremont Nursing Home it is obvious that all three participants are doubles; in the sports car Professor Davis (Will Hay) and Bobby (John Mills) and in the towed invalid chair Prof Davys (Henry Hewitt).