Naturally, some people (mostly old white dudes) were angry about this. Because they're angry about everything. Here's my "favourite" response:

"normal coloured plaster". What is normal? In a statistical sense, we might say that it is the most common. But I don't think that's what this person is talking about.
He is normal. Anything which caters to him is normal. Anything not specifically designed for him is abnormal.

This is a problem for a lot of people. The world moves ever so slightly to accommodate someone else and they go apoplectic with rage that their whims haven't been catered to.

Don't believe me? Go read the reviews of any RomCom and see the hoards of angry men. I mean, they even complained that She-Ra wasn't sexy enough for them!

The tweet also demonstrates perfectly the "I speak on behalf of all others" mindset. The thread was full of people of colour who said how happy this made them. And yet, this person decided to comment from a place of ignorance. Because they literally can't conceive of anyone not being like them.

And, while this isn't the most pressing problem in the world, it is not insignificant.

It's OK to focus on the "trivial" aspects. There are enough people tackling the hard problems that sometimes the best thing you can do is start chipping away at the small things.

This "default" culture cuts across everything. It defines anyone who isn't a cishet white man as abnormal. And it is utterly insidious. Once you acknowledge it, you'll see the problem everywhere.

There are accusations that Tesco ripped off a small business who had this idea first.

The brilliant thing about Shakespeare is its versatility. You can do almost anything with it. Mess around with genders, set it in space, make a puppet show. It all just works. Perhaps you've seen a gender-flipped version of one of the minor history plays set in Wales against the Miners' Strike and it was proper theatre. Or maybe you only ever watch all-male casts from the groundlings to see what it was really like back in the day.

Whatever. Each retelling gives us something new:

• When you watch an all-female cast, it plays with your sense of the presentation of masculinity.
• When it's set in the modern day, it challenges your notions of progress.
• When it's an all-star cast, you get the joy of intertextuality.

You can watch the same play a hundred different times and get a hundred different interpretations of the text. That's what I love - seeing a version that I'd never even considered.

Anyway, I don't think I've ever seen an all-black* cast perform Shakespeare. So, I found PBS's Much Ado About Nothing.

*NB that's how the PBS website describes it.

The only actor I'd seen before was Danielle Brooks from "Orange is the New Black". It's always tempting to think of TV stars as inferior theatre stars, and I'd only seen her in a few early episodes of OitNB. But, obviously, she is brilliant. She's fierce and frosty, sweet and merciful, and utterly hilarious.

Previously, I'd have said that Catherine Tate was my favourite Beatrice. But perhaps that's intertextuality talking?

The rest of the PBS cast are superb - although unfamiliar to me. That also brings a new dimension, when you have no preconceived notions of who an actor is, it frees you to enjoy them as a character.

You can watch clips of the whole show at PBS.org.

Shakespeare has a.... errr... complex relationship with racism. Othello, Shylock, Caliban - all great parts - but not exactly sympathetic characters, are they? Again, it can depend on how you cast the part, and how it is directed.

So, what does it mean to watch an mono-racial Shakespeare performance?

Well, first off, how often have you seen an all-white cast? The "Ado" with Tate and Tennant is embarrassingly pale.

So, my top tips for all of you:

• Seek out media which challenges your ideas of what "proper Shakespeare" looks like.
• Find things performed by casts which don't look like you.
• Notice how it changes the way you react to characters.
• Realise that the only bad Shakespeare is Shakespeare performed without enthusiasm.

Sadly, the PBS video is blocked in the UK. Although fairly trivial to circumvent.

If you're interested in Shakespeare, and if you think #BlackLivesMatter - you owe it to yourself to watch it.