Pietersen will be livid with the way he gave his wicket away
By Jonathan Agnew
BBC cricket correspondent, Lord's
Jonathan Trott compiled his highest Test score with a well-crafted century at Lord's, but his task was made easier by an below-average bowling display by Bangladesh's seamers.
A quality seam-bowling attack would have had any batting order in trouble on this wicket and in those conditions.
While it was awkward for Strauss and Cook in the first hour as the ball nipped around in the air and off the pitch, there were too many poor deliveries which relieve the pressure.
Everything was in their favour during the morning, but Bangladesh simply did not make the most of their opportunities and their fielding was poor.
The slow and low pitches in Bangladesh are a disincentive for the development of fast bowlers and because of that, their batsmen struggle against quality fast bowling against the better sides. It becomes a vicious circle..
The International Cricket Council's cricket committee recently recommended DRS be rolled out for all Test matches, yet we still have the same on-going issues
They are a spirited one-day and Twenty20 side, but three Test match victories in 10 years is not good enough - and Test cricket simply cannot afford to produce one-sided contests with Twenty20 cricket around.
Another issue of concern was the breakdown which led to the umpiring Decision Review System (DRS) being scrapped for this series.
The International Cricket Council's cricket committee recently recommended DRS be rolled out for all Test matches, yet we still have the same on-going issues.
As I understand it, the 'Hot Spot' people charge more for their system when DRS is in place, while Hawk-Eye does not. There are extra costs involved - and it's not just a case of wiring a cable into the third umpire's room either.
Another issue is Ofcom, the government's media regulation body, which forbids any form of sponsorship for Hot Spot or Hawk-Eye during on-air broadcasts.
Strauss has yet to score a first-class hundred this season
Britain is the only country in the world that forbids this form of advertising, which also contributes to the funding issue.
There was a conference at the ICC's Dubai headquarters earlier this year when the world's broadcasters and cricket authorities met to make the DRS work following the Graeme Smith incident in Johannesburg in January.
Making DRS more dependable and reliable means spending more money.
It currently costs about £300,000 to install the relevant technology for one series, but there is a breakdown between Sky, the host broadcasters, and the ICC and England and Wales Cricket Board about financing the technology.
Had DRS been in use on day one at Lord's, Cook might have been given a reprieve if he had referred Asoka da Silva's verdict, although I have every sympathy with the Sri Lankan umpire. It looked out at first glance.
As for Kevin Pietersen's dismissal, well, it would not have made any difference whether DRS was available or not.
He is in such good form at the moment, but he was unchallenged by the bowlers and getting fidgety. It was a lesson that anyone can get out at anytime - no matter how good they are.
Both KP and Andrew Strauss will be livid at the way they gave their wickets away.
You could see how angry Strauss was after playing a lax shot to Mahmudullah's off-breaks and not scoring his first hundred of the season.
It was the perfect opportunity for a confidence-boosting three figure score. He just played a poor shot - it wasn't because of technique, it was more his mental application.
Saying that, it was a well-crafted dismissal by Mahmudullah, a slower ball which tempted Strauss into a false shot.
However, with Trott well set, along with Eoin Morgan looking in excellent touch, expect England to finish with a huge score on Friday.
Jonathan Agnew was talking to Pranav Soneji