My experience, based on being due to fly to Portugal 4 July:
19 days before departure, got an email with 'options' for my flight, including the option to take a voucher. That offer expired 5 days before departure.
17 days before departure, had an email with 'important information' about my flight. This confirmed they'd moved me to a different flight for my return.
I knew this equated a cancellation which entitled me to a refund. Therefore I filled out the refund form on their Covid-19 disruption hub page, and followed it up with an email (with some template wording I'd found on the Easyjet complaints FB group) and by the morning, they'd refunded me!
The Easyjet FB group is called Easyjet Complaints Process - not so easy. As with any FB group, there are some idiots in there, but also a lot of useful information.
In particular, there was a really specific subject title for the email, and text to use in the email body when requesting the refund, which I think made a real difference in response.
Also, I timed my email to go in the middle of the night via Outlook, and had a response at 4am!
Obviously disappointing that this year has ended up like this, but had a good response from Easyjet, and hoping to travel again next year with them.