My four year old wont go to sleep! (He has a excuse for everything)

Bedtime routine in my house has not changed really since the boys were little, except now Adam goes up first, he goes to sleep almost instantly, I spend all day with Adam, so the half an hour once Adam has gone to bed,  That I get to spend with Liam, we spend reading his School book and having a chat is precious time that I really enjoy with him, until I say those little words "Its time for bed now Liam"

This little boy has an excuse every night as to why he should stay up later and once in bed there is a reason about every five seconds as to why he is shouting down the stairs  "muuuuuuuum"

Most of you with children can probably relate to this but hear are my favourite excuses, time lingering moments and reasons why Liam shouts down the stairs every single night.

• Mum can I just have two seconds longer.....................nope its bedtime now
• I need to read my book again.....................we have read it twice ... come on its bed time
• My leg hurts..........................yes Liam it probably needs to get some rest in bed
• but mummy im not tired............................hmmm look at me Liam..... yes they really are piggy eyes that need to sleep.
• Can I take my pad up to bed with me..................nope mummy is getting cross now.
• I neeeed a weeeeee ........................quickly hurry up.
• immmm too tired to walk up the stairs .............................Liam just go now!

Finally he is upstairs in his bed and it starts again......

• mummy I think I need a drink.............You have just had one
• But I'm still hungry........its bed time
• can you read me a story mummy.........no we have read our story's 
• I think my tummy is grumbling because I'm not tired..........
• Can I have a car to play with...............right one and I will choose (otherwise everyone I pick is not the right one!)
• can I have fudgy bear.............yes alright 

I have said my good night and told Liam to go to sleep now its very late, does this little boy go to sleep, no is the answer its usually as my foot has just reached the bottom step and I hear "muuuuuuuuuum" eugh what now I am usually muttering to my self and so it begins the trotting up and down the stairs because he is out of bed leaning over the stair gate............

• Mummy I think I heard a noise (a fire work, bird, tumble dryer the TV the list goes on) ........Liam just go to sleep 
• Mummy  I think I need to sleep in your bed.......
• Mummy I have a cough.........as he is completely faking his imaginary illness
• Mummy I think the TV is too loud.......

"mummy mummy mummy" it goes on and so does my evening usually for at least an hour after he has actually gone up to bed in the first place by the time I have finished with him and he has actually gone to sleep patience has disappeared my temper is frayed, there is nothing worse than being a tired mummy! 

Do you have trouble getting your child to bed what are there best excuses? I would love to hear your thoughts?