when someone mugs you off in a work email

do you reply all and give them what for or beatifically rise above it? or bide your time until they are least expecting it and strike?

Tempting as it is, you never look good rising to it. 

Tvvats like this never back up what they say in person, so if they are being arses you call them right back and when they don’t pick up reply all saying you’ve left a message and suggesting a call rather than email to sort it out. That way you actually do get to sort it out, and make it clear the other person is an arse, and appear to everyone else as a good egg. 

it depends on their involvement in your ability to make decisions and in how your value will be interpreted by those assessing your progression at your place of work.

 

If they are irrelevant I would ignore it

If they will have impact I would face it straight on and nip it in the bud

isn't yours?!?

but not everyone was on the email, it was just a group of people talking about VAT preparedness

(I am ashamed to say that I did not take the high road and am now demi-cringing)

Heh. You rise above it. And never actively strike.  Just place a small mark next to their name in your mental notebook not to piss on them the next time they are on fire.

Someone in my office showed me a picture of someone on a remain march holding up a placard saying "This is like that time Geri Halliwell overestimated her ability as a solo artist".

I felt sad for them that that's the best Brexit-related humour they've seen.

one of my worst enemies works as a VAT director at an EY regional office

I hope it's not him

I would actually say he is my top worst enemy (the Linklaters guy was in IP so doesn't count)

"If you wait by the river long enough, your enemy will have time to disappear into the jungle, sneak round the back and creep up on you, catch you nodding and push you off the cliff into the raging torrent and your anus will snag on upturned branch just to make the point".