Rumour was they needed 30 and have got about 10 ?!
People in established job aren't interested, people in airline hold pools are being called back, alot of eu folks working in uk traded in for easa licence and headed back to home country during covid, alot have learned to live on less money and found other lines of work and just aren't interested in a poor contract in a rising job market.
If they offered circa £500 a day, no training costs, and a sensible bonus on completion of the full contract period, they could have filled these positions quickly without any fuss.