Can I Take a Name Off My Son's Birth Certificate with DNA Proof

My question involves name change laws in the State of: uk when my son was born in 2001 the man who is down on the bc is not my sons real farther i have done dna and have the results to prove it but i do not no who is my sons real farther but can i have the man who is named as his farther now on the bc removed? i have now had 2 children with a lovley man who has brought my son up as his own and my son thinks this man is his farther as he has had no contact with the man named as his farther on his bc plz help