Vueling to open a base at Lgw from April 22.

What routes does Vueling fly to from Gatwick airport.

According to Wikipedia. They already fly to:

Barcelona
Bilbao
Florence
Paris Orly
Rome
Santiago de Compostela
Valencia

They are planning to add from April:

A Coruna
Asturias
Granada
Jerez
Malaga
Menorca
Paris CDG
Seville

Is this just part of BA Euroflyer? or in addition to their original press release of 18 SH BA aircraft?
We're not BA going to lease some slots to EZY so they could expand as well at LGW?

This is further expansion operated by Vueling. It will likely get a BA code but obviously there is no Club etc on Vueling.

..and not the last of this apparent VX /BAEF overlap..

BAEF Routes:
Alicante (ALC), Amsterdam (AMS), Antalya (ATY), Athens (ATH), Bari (BRI), Berlin (BER), Bordeaux (BOD), Cagliari (CAG), Catania (CTA), Dalaman (DLM), Dubrovnik (DBV), Faro (FAO), Gran Canaria (LPA), Heraklion (HER), Ibiza (OBZ), Kos (KGS), Lanzarote (ACE), Larnaca (LCA), Mahon (MAH), Madrid (MAD), Malta (MLA), Malaga (AGP), Marrakech (RAK), Milan (MXP), Nice (NCE), Rhodes (RHO), Palma (PMI), Paphos (PFO), Santorini (JTR), Seville (SVQ), Tenerife (TFS), Thessaloniki (SKG), Turin (TRN), Venice (VCE), and Verona (VRN).
Vueling Routes:
Barcelona,Bilbao,Florence,Paris Orly, Rome, Santiago de Compostela,Valencia,
Vueling Additions:
A Coruna, Asturias, Granada, Jerez, Malaga, Menorca, Paris CDG, Seville.

By complete coincidence (of course!) the only route where BAEF and VY overlap is Malaga. I think BA could send A380s there and still fill them. In fairness most of the routes VY are planning are pretty interesting destinations in their own right, if slightly off the beaten track from a "Spain = Costas" tourism mindset. Are any of these served by easyJet at the moment?

Yes quite a few which again begs the question about leased slots to EZY, still going to happen or is that arrangement gone soar?

I believe BA still had quite a few unaccounted for slots. According to what I can find online, at the peak, BA operated around 25 short haul aircraft, I think it might have been a few more and closer to 30. For sure there were the 10 G-GATx, 6 G-MIDx/G-MEDx A320s, the 10x G-DBCx A319s and usually a few extras from the LHR operation.

At 'just' 18 aircraft the BAEF operation needs a bit of friendly help to use all the LGW slots. Is there any word on which aircraft the LGW operation will use? 18 is a conveniently identical number to the A321ceo fleet thats had a few years parked up in Spain.

The A321ceos are now appearing on LHR T3 ops for S22 so doubt it will be lock stock transfer to LGW.

Just reading an article about RYR expanded base at DUB and it says LGW will be 8 daily S22.
Is that above pre-covid levels?
Along with 8 & 4 daily to STN & LTN from DUB that's alot of capacity!

Yes, I think FR 8 x daily on DUB-LGW is more than pre-Covid, but not 'new' for S22. They were operating 8 daily flights on the route from the start of the Winter season (end of October) until the New Year.
Cut quite drastically for the moment, as is much of their European network

Ryanair used to operate 8 daily DUB LGW pre pandemic in 2019. I recall that also would have had daily SNN, ALC and ORK. So I'm guessing they have something like 11 slot pairs. Clearly other routes operated at times including Kaunas, Seville or Malaga, but subject to be corrected .

I remember back around 2010 when Ryanair were operating about 15 routes from LGW - That was largely due to the BAA debacle at STN during that time - but don't think LGW-DUB was operating at nearly that kind of frequency then.

A fair few BA ones do but they always did. As for the new Spanish routes, Granada was served until Covid and Asturias was served from STN until the base closure

Presumably the Vueling based aircraft are going to have to be on the G-reg?

No, not unless they serve non-EU.

How many units will Vueling be basing at Lgw? 2 or 3 as I have seen different reports.

All reports I’ve seen say 3 planes. There will also be 4 Iberia Express A320 on lease to BA Euroflyer for the summer season.