England's Eoin Morgan said the resolve his side showed to recover from 22-3 against Sri Lanka is a "crucial part" of their game.
After losing the toss and being put in to bat, England struggled at the start of the second npower Test at Lord's.
Morgan scored a fluent 79 alongside Matt Prior (73*) and with Alastair Cook (96) and Ian Bell (52) helped bring the home side back into the match.
"We're quite pleased with the day. Obviously we had our backs to the wall and Cookie played outstandingly well and showed his unbelievable form." Morgan said.
"Then, when the pressure was on, Belly did the exact same. It made it a nice position for Matty (Prior) and I to come in.
"It's great to see a reward for some of the hard work I've put in over the last six months or so.
The Middlesex left-hander added that England have made a conscious effort to add more steel to the mental side of their game:
"We've talked a lot about it as a side. If we want to be the best side, when our backs are to the wall we want to come out fighting.
"It's a crucial part of our game - we just can't fall over like a deck of cards."
Sri Lanka 'disappointed'
Sri Lanka's batting coach, Marvin Attapatu admitted his side were a little disappointed after appearing to seize the early initiative:
"I thought we took the first two sessions, up until tea.
"Before tea we thought getting England out for anything around 300 would be a good total. Now, with Prior batting well we think around 400 - if we can get early wickets [tomorrow] it'll be good.
Attapatu admitted his side are missing the experience of former star bowlers Muttiah Muralitharan and Lasith Malinga.
"Sri Lankan cricket: we play to win. We always used to be able to rely on Murali and Malinga and think 'Yes, we can get 20 wickets'.
"Now, with a younger side, we've given them an extra bowler. It's different.
"The first session tomorrow will be crucial for us."