Cheers chaps for replies.
Races themselves run fine no lag, delays or stutter in races themselves.
Is the loading and switching between screens.
For example when finish race details pop up straight away, but when press next to go onto winnings screen there is just empty garage with 2-3 second delay then car pops up, then another 2 second delay before car animates and starts rotating.
Same when upgrading parts, same thing happens also with loss of sound and even longer delays.
Also happens when combining cars.
Don't think is anything to do with my internet connection as I am on fibre optic broadband with a 5g/2g WiFi connection. Don't have a PC or laptop that uses the broadband is purely my phone and that's it.
Have tried everything else on phone youtube, eBay etc all run fine and fast is just drispi.
Will have to wait and see if maintenence updates improve it.
Anyway thanks for the replies chaps.
Good luck on upcoming BB and may the drispi gods grant you lambos