Strike's impact on inbound flight (September 30th)

If it was only that simple.

Remember, dozens of flights will be affected. Some will be rescheduled, some will be canceled. It depends on a lot of things especially how bad the airline needs the plane in Bologna. (Remember, it's not just your flight. That plane flies a few routes in one day.)

As you get closer to the actual date,and they are sure the strike will take place, Italian ATC will work with all the airlines involved. They will keep you informed as to the status of your flight.

Hi, Giangilberto from Milan, as they report "PERSONALE SOC. ENAV APT BOLOGNA' and 'Interregionale'", this isn't a national air traffic control strike: it's ENAV staff at Bologna Airport alone, Italian airspace as a whole isn't affected.
Your flight arrives at 6:40 PM, that is, an hour and forty minutes after the strike ends. So your landing falls outside the strike window entirely.
Clearly, Heathrow isn't affected in any way, the strike affects a single airport.
If the flight receives clearance to depart during the strike, I honestly can't tell you.
The decision concerns the assignment of slots, and the air traffic manager makes it a few hours beforehand.
Law 146/1990 states that air transport is an essential service, and the airline is required to inform passengers of how the service will be provided at least five days in advance.
So, your airline must communicate something to you by September 25th.
The only useful source is the airline, not the registry, they know about the slots.
Last but not least, as they report on strike tracker:
ENAC publishes a list of guaranteed flights before each strike, and airlines contact affected passengers directly.
If you are flying that afternoon, check your flight status with the airline before leaving for the airport, and allow extra time for connections.
I also recommendo you to use the official website of Ministero dei trasporti to keep update with the strikes, link below.

https://scioperi.mit.gov.it/mit2/public/scioperi

Thank you - yes the official website is where I first saw the information, the strike tracker website was just easier for me to read. Sadly, I think it is actually a national strike not just Bologna, though admittedly, I have zero experience with this :)

Page 5 is where I found the strike information https://scioperi.mit.gov.it/mit2/public/scioperi

So, you were right, the strike is also national. I just checked the ministry's website again.
Techno Sky is relevant: it's the ENAV group company that manages the maintenance of air traffic control systems, so the strike affects both controllers and those who maintain the systems.
For your flight, the outcome remains the same: the strike ends at 5:00 PM and your plane lands at 6:40 PM, so your landing still falls outside the window.
What does change is the risk of delay: with a national ENAV strike, slots departing from Heathrow to Italy can be reassigned, and delays accumulated in the 1-5pm slot carry over into the following hours.
And the law also remains valid: the airline must inform you at least five days in advance, so by September 25th.

We are in the same boat. Our connecting flight from Amsterdam will land an hour after the strike ends. I'm thinking I'll book an airport hotel near Schipol for the 30th, just in case we are stuck there. Not sure if the airline would reimburse for the hotel. We'll be paying for one in Rome, too.

Another factor to think about is where is the plane coming from?

As an example, the plane that flew your flight between London and Bologna yesterday previously flew London-Belfast and Belfast-London before that flight.

The day before, the plane started in Copenhagen, flew to London, flew to Zurich, flew back to London and then flew to Bologna.

You won't know where your plane will be flying from until a day before your actual flight or even that morning. And it could still be changed mid-day. Since all flights to and from Italy will be distrupted during the strike period it's possible that planes and crews will be changed last minute.

Also be aware that ATC strikes are considered extenuating circumstances and not covered under EU 261. So, no extra compensation, hotel vouchers, etc. If your flight is canceled they have to put you on the next available flight (no extra charge) or offer you a refund.

In the spirit of misery loves company . . .

I'm scheduled to land at FCO at 11.45 a.m. on the 30th from Tel Aviv (~3,5 hour flight). I believe the aircraft has a scheduled return flight to Tel Aviv with a short turnaround.

It does make sense to consider where our plane was located before coming to London. I reached out to the email address on the official website and they said that due to it reaching Italian airspace before the strike is lifted that it will likely be impacted (even if our plane had arrived on time to London) but that we won't know for certain until 5 days before. Which I remember reading here.

With that said, AA/BA seems to often put out the option to change flights in advance with no fee when strikes occur but so far I think it is too far out. If they do we may just try to fly in the day before.