Not that much irregularity with A333 C-GTSO / TSC264 today - started with a MERSI 1B arrival. MERSI was passed 1,100 feet above minimums at 7,100 feet. Above Bolton it was at 5,700 feet and the next plot halfway between Bury and Oldham it was on 4,350 feet. On the next plot the Air Transat A333 was around 400 feet below the 3,500 feet specified minimum between Hurst and Stalybridge 11 nautical mile out. The two last plots showed only minor deviations from glideslope (80 feet and 130 feet below). In other words not to low, just a bit low at parts and at least 1,800 feet clearance to ground around 11 nautical mile out.
Altitudes and coordinates for TSC264 was found on flightradar24.com using the playback mode and STAR/Instrument Approach Charts came from NATS AIS.