Worst thing = management. Overbearing and patronising to say the very least
You'll get the pension that the law forces them to give you. They add a percentage on to the staff sales which already have an artificially high cost price. Maternity pay is the minimum the law forces them to pay. Paternity is likewise. Annual leave is the minimum the law forces them to give you. Performance bonus is offered and there. Good luck finding and employee who was paid out though! "Company Car". It's a Kia Cee'd and you'll pay full tax on the fuel because they're too lazy to do the personal mileage with HMRC.
List based on reports from current and former employees. It may not be complete.