It seems like a good reason to me. They couldn't pardon him when it mattered, and now they want to puff themselves up with how magnanimous and tolerant they are, just when it doesn't matter? Screw that!
The pardon doesn't serve anybody's interests but their own, it simply uses what was done to Turing to enhance their own political reputation.
Reminds me of the mormons baptising dead jews - it is actually offensive.
It no longer matters to Turing, but it still sends a message to the country that how he and others were treated was wrong, which is a good thing.
Whether a pardon is needed after an official apology was already issued is debatable, as they both send the same message, personally I'd like to see it passed but won't really care much if it doesn't.
It's very different to "converting" dead people to your religion, as this act would have been offensive to them if done when they were alive. However Turing would not have been offended if pardoned while alive.
Those two things are in no way related. There is nothing offensive about admitting to previous mistakes and making a gesture to an important figure that you wronged. There is something offensive about radical the religious attempting gain attention by performing baptisms on dead bodies that have nothing to do with them.
The pardon doesn't serve anybody's interests but their own, it simply uses what was done to Turing to enhance their own political reputation.
Reminds me of the mormons baptising dead jews - it is actually offensive.