My understanding is that your employer has to release you for service if you are called up as either a TA or reservist. however there is also an obligation on your part to inform your employer.
If you are thinking of joining remember there is a commitment both in terms of initial training and annual comitment (Potentially 2 X 2 week blocks plus all the weekend and weakday eavnings sessions) This may conflict with your roster, life style and significant other.
Check with your local unit as to what they think is the minimum your employer has to provide and check with them to see what their actual policy is.
Being a non uk company ryanair may fall outwith any statutary requirements.
Going from TA to RARO means you can resign at any time and slope off!
