Micra 1240cc petrol gear issue

[Kevin Nicolson]

Looking for help with a 2007 micra 

Spirita 1240cc petrol 

 

issue is getting the gears to change. When at standstill they work just fine and also when moving slowly , the issue getting the gear to go in gets worse the faster you go ?! Does the same if car is hot or cold , gears just struggle to change , initial thought was clutch but odd it’s worse when you get faster ? 
 

thoughts ? 
thank you 

[Trevor]

Maybe look at the engine mountings as if they are under load it could be pulling the engine over slightly too much which could affect the gear selection (only a thought)

Otherwise may be worth changing the gearbox oil to see if that makes a difference