Unclear and constantly "restructured" pay and promotion structure. You are always on track for the next period. This absolutely destroyed morale in many teams, to the point where everyone was looking out for themselves and stopped celebrating other colleagues' success stories in envy.
Expectation and workload do not match up with compensation. Monthly meetings continuously emphasised how well the company was doing, with all targets exceeded, but it was never reflected in pay or other incentives.
Be cautious with using Moneybox's Glassdoor reviews when deciding if this is the place for you to work. They tend to entice new starters, during their honeymoon period, to leave a good review in their first month. These reviews are not a clear picture of whats really going on.
Not a place to work in roles which are industry-specific (Operations and Compliance). The company will constantly underpay and under-reward you in comparison to its competitors' compensation packages. Once you attempt to leave for a competitor, they will threaten to pursue legal action against you. Very harsh given many do not have the luxury to simply start from scratch in a new industry with lower pay (especially in London!).