I say again, the RAF is dealing with individual pilots: via the careers office and rejoiners scheme.
In terms of temporary work, to deal with individuals then you need a pilot to be under the employment of a company willing to engage in sabbaticals. BA is the only company to have come out of the blocks publicly in that respect.
You make a secondary point that consideration needs to be given to agreements for cessation of temporary contracts. I’m sure it will be.