Definitely not, if anything you'll be seen more promptly if you make your own way to hospital. Ambulances are really only of benefit for those to sick or injured to be brought by any other means.
There's a massive problem with people recognising some warning signs/that they or their child should have an a&E checkup, that it might be an emergency, but think that means they need to call 999 for a lift to hospital! Our absolutely typical patient that gets taken to hospital is asked to take some of their own paracetamol for their symptoms, walks onto the ambulance, has a routine set of OBS, gets dropped off the other end. 45% of calls in my trust are discharged by paramedics, not even a chat with a Dr on the phone (i.e. presentation so minor/well appearing patient just needed self care advice or signposting to GP - these are people who've deemed to call 999!).
If we as the public expect the emergency service to be dealing with the worried we'll, we absolutely cannot ever expect them to also be managing emergencies promptly so have to take the sacrifice that the pedestrian knocked down by car will routinely wait 30-60minutea, the elderly broken hip at home 2-8hours.
Might vary across the country, but in my city at the moment cat2 calls currently have a 2hr response (this is abnormal breathing, stroke, heart attack). Yet the huge majority of people live within 15min drive of the hospital. Why the hell would you sit and wait 2hours when you could be at the hospital in 15minutes unless you absolutely had no choice? I know if any of my loved ones have chest pain or a stroke I wouldn't consider calling 999. But I goto work all day and night hearing "well I've been having this pain in my chest for about 6months now, GP says it's reflux and the meds do help, but I was thinking I should get a second opinion and TV said to call 999 for chest pain,what do you think???"
When you arrive at A&E with chest pain you'll get ECG and bloods early on - if they're abnormal and indicate treatment you'll get escalated rapidly. If they're normal then there's a wait. If you arrive by ambulance then you have the ECG which can quite often be normal even in a heart attack, but you don't get the bloods until you're booked into the hospital. The ambulance patient waits around 2hours for the response, maybe 20mins in the house, then driven to the hospital, then 2-4hours in the car park being monitored, then the important blood test only after being booked in. (although currently changing rules and soon we'll be dropping chest pain looks well I to the waiting room with out any handover.