It would be wonderful if it was a DC-4!
Mr Kilkenny, I know exactly what you mean. These aircraft fly at very high altitudes and their much lower airspeed is very noticeable.
There are a few Russian prop transports that fly about, or they could be military aircraft possibly (and, if they are, I doubt tracking websites would be much use).
Wouldn’t it be fun if they were TU-95 Bear bombers buzzing our airspace, as they have been known to in the past? Mr Putin, if you are going to do that, just say when and where so I can have a pair of binoculars at the ready.:)
— My mate flew on the Nimrods at Kinloss before their retirement and said it was frightening what visits our seas/airspace. Tu-95’s and Russian subs and were talking monthly visits at times though mainly ‘friendly’ hellos nowadays.