New Zealanders will see the best locking double act in the world when England tour in June, if former England lock Ben Kay is right.

Kay told The Rugby Paper that Courtney Lawes and Joe Launchbury were the perfect second row partnership.

"Are they the best second row partnership in world rugby at the moment?" he asked.

"I think so, although there are some very good young South Africans coming through."

Kay said the pair operated well in tanden.

"Obviously Lawes does a bit more of the physical stuff in terms of his hits and carrying and Launchbury perhaps does a bit more of the unseen stuff. I think I'm right in saying he's England's second top tackler, which is phenomenal for a second row.

"In this partnership you wouldn't be able to pick out the 'enforcer', which isn't a term I'd use anyway. Yes, Lawes is probably the more aggressive but he also does more of the flash stuff as well.

"As an international you should be able to do everything, and I think their biggest strength is that they seem to be able to do that," he said.

Meanwhile, there was still the likes of Geoff Parling who hasn't been able to force his way back into the side since suffering a shoulder injury against New Zealand in November.

There were still also concerns for England in the mid-field and in the loose forwards with a multiple of choices.

"The good thing for Stuart Lancaster is that he's faced with selection headaches right across the board," he said.