Jet2 claim for late flight


Have made a claim with Jet2 for a 4.5 hour delay on a flight from Gran Canaria to Bristol a few days ago.
I submitted the claim pretty much whilst waiting for baggage to come onto the belt after landing in Bristol, I used the template from this site - pasted below. I got a Jet2 auto reply saying they will take 10 weeks to let me know their decision. My initial question is: should I give Jet2 10 weeks as they say? Or escalate to the CAA after 14 days as per my template letter?
W. Ithaspritz
123 Any Street
Anyshire AA11AA
Dear Sir or Madam,
Re: Compensation claim for delayed flight
Booking reference: 1234567/AA11
I am writing regarding flight LS1854 on 23/06/2022 from Gran Canaria Las Palmas to Bristol with the scheduled departure time of 17:30. This flight arrived 4.5 hours late at Bristol.
The judgment of the Court of Justice of the European Union in Tui & others v CAA confirmed the applicability of compensation for delay as set out in the Sturgeon case. Now that EC Regulation 261/2004 has been written into UK law, I am seeking compensation under The Air Passenger Rights and Air Travel Organisers’ Licensing (Amendment) (EU Exit) Regulations 2019 for this delayed flight.
The passengers in the party were:
W. Ithaspritz (Lead Pax)
Q. Ithaspritz
My scheduled flight length was 2820km therefore I am seeking £350 per delayed passenger in my party. The total is £700 for all passengers.
I look forward to a full response to this letter within 14 days. If I do not receive a satisfactory response I intend to pursue my complaint further, which will mean escalating to the CAA (in absence of Jet2 ADR provider) and ultimately could mean taking it to court.
Yours faithfully,
W. Ithaspritz
Lead Passenger
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Replies
Once on board the pilot said it was due to covid absence of ground support crews at the previous airport (also Bristol)
In this case, following the links on the likes of Flightradar24, it can be seen that the aircraft operating this flight was delayed right at the beginning of the day - it was supposed to depart Bristol (to Reus) at 06:45 but didn't leave until 11:08, so everything else was a knock-on from that. Take screenshots of such data while still within seven days, it may come in useful!
I see you've already posted on another thread about Covid excuses, and on that one there are links to CAA guidance and court cases about how airlines can't generally treat staff absences as extraordinary circumstances....
https://forums.moneysavingexpert.com/discussion/comment/79297435/#Comment_79297435
I can spell, my iPad can't.
It solves a lot of ambiguity later on.
I can spell, my iPad can't.