I would absolutely not recommend applying to work as a personal shopper for Tesco, especially Tesco Extra Kettering.
A typical day would consist of being completely ignored by one manager, bullied and belittled by another, and being shouted at by my supervisor. My contract was roughly 6 hours per week, and with no explanation or warning, I was expected to work 39 hours a week, with as little as 24 hours notice (even over the Christmas period!) just because I made the mistake of saying I was available. On multiple occasions I have had to console other colleagues getting upset or angry because of unfair contracts or bullying by managers.
The staff on my department were very kind and are a very close knit group that get on well. That is the only thing I will miss!