[FoxtrotGolfXray 5.0]

Yep, my vote is fr24.

Sitting at the observation area at the north side of Tulla is pretty cool when you know what's coming in, especially when the a380s were regular visitors!

Available via a Web browser or the free app. My suggestion is that you turn on call sign text labels. Once you get to know the callsigns, it makes it easy to identify aircraft of interest. For eg, pc21s around East Sale use ROLR (Roller, a student pilot), MERL (Merlin, a formation flight) and CTRL (Central, a flight ftom Central Flying School) or air ambulances that use AMXXX.