There probably wasn’t much time spent building the case. Generally solicitors aren’t involved in these cases because it’s not possible to reclaim legal costs, regardless of who wins. Instead most people just represent themselves, and companies will often just send a local manager to represent them. So super low stakes legal process, where in the worst case scenario your out of pocket for the filing costs (£70) plus reasonable expenses for the other party (travel costs, lost earnings etc) which are all tightly capped, so unlikely to more than another £100-£200.
