The budget airline, which was expected to climb back into the blue chip list, and online food delivery platform will replace Hiscox Ltd (LON:HSX) and Fresnillo Plc (LON:FRES).
Present for Xmas
All the changes will be effective from Monday 23 December under index operator FTSE Russell’s market cap-based approach.
Dropping out of the FTSE 250 into the small caps will be Card Factory PLC (LON:CARD) after a 56% decline over the past four years took it just below the cut-off point, which is currently just below £550mln.
Also relegated from the mid-caps were two investment companies, the NB Global Floating Rate Income Fund (LON:GBP), even though its shares have risen this year, and Riverstone Energy Ltd (LON:RSE), which is down 66% over the past 12 months.
Survivors, for now
Surviving the drop this time, but sweating in the danger zone for the first-quarter review in 2020, include such Footsie names as Centrica PLC (LON:CNA) at £4.5bn and currently the 100th biggest company on the market and Kingfisher plc (LON:KGF) at £4.3bn.
A little higher but quite within the realms of possibility if share price moves don't go their way, are Hikma Pharmaceuticals Plc (LON:HIK) at £4.6bn, both J Sainsbury PLC (LON:SBRY) and Wm Morrison Supermarkets PLC (LON:MRW) at £4.7bn, not far off Meggitt PLC (LON:MGGT) and Pearson PLC (LON:PSON), which are both below the £5bn mark.