"Unacceptable wait for ambulance"

My father woke at 11. 30pm with bad chest pains. Having had a heart attack a few years previously he understood the symptoms. He called himself an ambulance and woke my step mother. She then called me. I arrived half an hour later my dad was grey, breathless and clammy. I called the ambulance again. And explained the situation.   They told me an ambulance was on its way. 1 hour later the ambulance arrived. So a total of 90 mins waiting for an ambulance.

I understand ambulance staff are stretched but I feel this was a real emergency and feel this was far too long to wait. In the hospital my dad, step mum and I were in the ED until 8 am before he saw a doctor. who informed us he would be staying in. He was transferred to a renal ward as there were no spaces on the coronary ward. 2 days later he was transferred to a coronary ward. Where he was diagnosed as having suffered an angina attack. And had to have a stent inserted. Luckily this was a positive outcome. However I feel a 90 minute wait for an ambulance is unacceptable.