Well that was interesting. 
Had to pop into Kettering on the way there to drop something off. Wednesday was also the morning the M6 was closed between 2 and 3.
Google Maps took me off and through lots of back roads before coming out near Warwick and down the A46? to the M5. Only lost 35 mins which wasn’t too bad.
Coming home today, came up M4, as I got onto the M25 Google Maps suddenly added an hour and 10 to my journey. Apparently there was an accident on the M11, it rerouted me the way I was going to go anyway, up to St Albans, A1, A505 to A11.
My satnav has now been thrown away and Google Maps, via my phone, is the way to go from now on.