Nissan Largo Friends

hi my names bobby,
ive just bought a largo not sure which model still waiting on the log book but im having issue with the starting ive changed glow plugs and diesel treatment threw it. it starts brilliant in the morning but as the day goes on its lumping starts but then cuts out and it wont stay ticking over can anyone give me some advice i can do some machanics myself but being a female i can only do so much im not good at diagnosing a problem other than basics need help thanks

Crank sensor is what i would think is your problem, seems like a very common fault with those diesels somewhere around £100 to replace.
Hope that helps and welcome to the forum