How many cancellations have you clocked up? (so far)

Last 5 years
City of Angel's
Judi Dench
Pretty Woman
Westend Eurovision
HMS Pinafore
West Side Story
Back to the Future
Operation Mincemeat
That's just up to mid May.
Plenty more from May on that no doubt will also be cancelled.

17 in total so far with another 24 booked up to the end of August which are all likely to be cancelled.

Just The Seagull and the Music of Judy concert at the Southbank at the minute, but expecting Sunday in the Park and A Doll's House to follow soon.

Plus postponements of 4000 Miles, To Kill A Mockingbird and a Queen gig at the O2.

Nothing else booked apart from a couple of Young Vic shows over the summer.

So far:

Beautiful UK tour
Everybody's Talking About Jamie UK tour
Broadway Princess Party at Cadogan Hall

Not hopeful about Bring It On, which was supposed to be in June.

Thankfully I hadn't booked too much as didn't have the money but so far:

Theatre:
The Tempest
Indecent
The Doctor
Blood Brothers x2
Choice Grenfell

Concerts:
Fizz
Johnny Logan
Melissa Errico
80s Classical
Louise Dearman
Lionel Richie
Diana Ross

Then still expecting Hello Dolly and Much Ado About Falstaff to cancel/reschedule in August

2 Swan Lakes at ROH, Daddy, Judi Dench at the Bridge, Indecent, The Seagull, 4000 Miles x 2, Jack Absolute at NT, and Dear Evan Hansen. And, considering that the Barbican will be closed till the end of May, I'm also missing for sure their Macbeth and Death in Venice. I'm still hoping for Isabelle Hubert in Glass Menagerie and Sunday in the Park with Jake but alas

Not too many: luckily, I was quite indecisive about buying tickets far ahead, so it ended up being just a few. 

In March I had two shows I was due to see for the second time - Afterplay and The Welkin - both of which I was so looking forward to! I'm a happy repeat offender when it comes to theatre, and in these two cases I love the work of the directors - and had loved both plays the first time around - so the idea to see them again was such a joy! I'd booked for a talk with James Macdonald and Lucy Kirkwood at the National too, so I was really excited about rewatching The Welkin after hearing what they had to say about it. I was also meant to go to the Hampstead theatre for the first time, to see The Dumb Waiter, and to see a few more shows at the VAULT Festival.

In April it was Claybourne Park (for what would have been my first time at the Park), Katie Mitchell's Orlando (which I saw online a few days ago, and will definitely go see in Berlin when I can - I simply love Mitchell's work), The Effect at the Boulevard, 4000 Miles at the Old Vic and Rare Earth Mettle at the Royal Court. 

In May I'd only booked for the House of Shades at the Almeida (I was about to book for Daddy too, but that never happened - I have gone to see everything at the Almeida since I moved to the neighbourhood, I love that theatre), and in June for The Glass Menagerie at the Barbican and The Glow at the Court. I hadn't booked for anything further ahead. 

I was also supposed to see two concerts - Foals and Toby Driver. The former has been postponed until May 2021, the latter may sadly never happen now. 
The next concerts I have lined up (Steven Wilson and The Pineapple Thief) are in September, so I'm keeping fingers crossed those will still happen.

24 confirmed cancellations plus 3 in July/August that I'm expecting to be cancelled. I tend to book operas/ballets/concerts further in advance then fill in the gaps with West End stuff nearer the time, which at least means I haven't had to deal with ATG! The ROH accounts for the most, with 8 performances, followed by Opera Holland Park with 4.

I think this shows how diverse our tastes are. 12 cancellations and 3 postponements here.

NT
The Welkin
Welcome to Iran
Manor
Jack Absolute Flies Again

Almeida
Daddy
House of Shades

Young Vic
A Doll’s House
Orfeus: A House Music Opera

Bridge
The Southbury Child

West End and other
Dear Evan Hansen
Wimbledon Tennis
Duran Duran at Hyde Park

Postponed
Pet Shop Boys
Leopoldstadt
4000 Miles

Just checked ATG list of cancellations/postponements and Mamma Mia is listed as pending.

Theatre:
The Last Five Years at Southwark (which was rearranged from one of the performances cancelled due to illness)
Beautiful at Wimbledon
Plus Love Story in Concert rescheduled to September (from May)
Just waiting for the inevitable with SITPWG

Concerts:
Taylor Swift at Hyde Park British Summertime (July)

Sports:
Euro 2020 (June)
Wimbledon (would have been doing The Queue as we never win in the ballot)

I also had a holiday to Orlando in mid-March cancelled.

Yes, I watched the first 10 minutes and was quite pleased I’d got my money back! 😆

Cancelled
Daddy at Almedia
Cases at Other Palace

Rescheduled with new dates confirmed
Hairspray (only rebooked for 1 show, had tickets for 3 originally).
Queen with Adam lambert
Luke Evans
Sister Act

Rescheduled no give date yet
Pentatonix

In Limbo/Denial
Sunday in the park with George
Swan Lake Masterclass

14 Cancelled - Quality Street, The Croft, Milky Peaks, Rockets and Blue Lights, Absurd Person Singular, Six, For the Grace of You Go I, The Habit of Art, Dial M for Murder, Resilience, On the Beach, West Side Story, The Glass Menagerie, and Let the Right One In.

3 Postponed - The Sound of Music, 4000 Miles, Sister Act.

Almost certainly going to get cancelled - Sunday in the Park with George (twice), Hamlet (Cush Jumbo at the Young Vic), The Pillowman, A Doll's House (Jamie Lloyd one with Jessica Chastain), South Pacific and The Unfriend (would have been my first trip to Chichester).