Reasonably easy process to drop car off. Bit confused by automatic check-in but a friendly human being was on hand to help. On return, typical bun-fight to collect car. I noted that two lady operatives were coping reasonably well and were returning keys to owners in a caring and friendly manner. Because queue was increasing, jobsworth supervisor stuck her oar in and completely trashed the system that was working fairly well. Chaos ensued and I was left with a bad taste in my mouth, having waited over-long for eventual return of car key. Supervisor not very amenable, she needed to wind her neck in!