There are a few exceptions, but, in the main, GP receptionists are the most unreasonable, unsympathetic and power-mad creatures on Earth. Unfortunately, this has been the case since the very beginning of the NHS and no-one in power seems to have been willing to change the situation.
I worked in the stores for an NHS department called the Family Health Services Authority, which was the de facto employer of GPs, Dentists, Pharmacists and Opticians and their staffs around the region. When the GP receptionists tried to use the dogmatic tactics on me that they used on ill patients, I delighted in reminding them that I represented their employers, that they were dependant on me for supplies and that if they didn't change their attitude I would be notifying the powers-that-be. That shut 'em up pronto.
The FHSA arranged educational courses for staff. The GP receptionists were keen to attend presentations on, say, "Assertiveness", but when it came to "Improved Customer Service" not one of them applied for it.
I have personally known of fully-qualified hospital nurses who've had trouble getting appointments with their GPs because the receptionists reckoned that their assessment of the nurses' health was more accurate than that of the nurses themselves.