The Official Online RBS 6 Nations Store is open. The store has everything you need to get behind your team during the RBS 6 Nations, plus the store is now fully stocked with a much wider range of rugby merchandise.
Since making his debut in the RBS 6 Nations clash with France in 2008 Croft has won 25 England caps as well as turning out three times for the Lions.
And as well as expressing his delight at securing Croft’s signature the former England hooker predicted the 25-year-old will only get better.
"Everyone here is delighted that Tom has signed a new contract,” said Cockerill.
“He epitomises the spirit of the club and he is already seen as a senior player at a relatively young age.
"He is another example of how well players can develop within our environment.
"He proves what hard work and determination can do in the game and that sets a great example for other young players.
"He is not new on the international scene but he is now being talked about as a world-class player at the very top end of the game. And, at 25, he can get even better.”