I once asked Panshanger if I could hire an aircraft from them because it's convenient for where I live. At first they were quite helpful and I agreed with them that it was reasonable to ask me to check out with one of their instructors.
Then I made the mistake of telling them that I was an instructor. The guy on the 'phone then went off to check with someone more senior than he was and told me that the checkout would be five hours minimum.
It was very clear that they didn't want the business from someone who instructs elsewhere and I always wondered from that what they were trying to hide.