Indeed not, initially.
As it turns out, however, nobody else appears to be allowed to wear necklaces, either:
The airline's uniform code states that staff must not wear visible jewellery or other 'adornments' while on duty without permission from management.
While I'd agree, of course, that the exceptions are not entirely consistent...
It makes exceptions for Muslim and Sikh minorities by allowing them to wear hijabs and turbans.
Under rules drawn up by BA's 'diversity team' and 'uniform committee', Sikh employees can even wear the traditional iron bangle - even though this would usually be classed as jewellery - while Muslim workers are also allowed prayer breaks during work time.
Not exactly the same, however. An armband is not an overtly religious symbol, and it might be less problematic regarding safety-relevant situations.
Hijabs and turbans are actually cultural
symbols more than religious ones, so it's not exactly the same either. What is more, both are culturally mandated
within certain groups, while the wearing of a cross necklace is not - it is very much optional
. So allowing the former may remove a barrier of access to a career while the latter certainly won't.
Allowing prayer breaks out of sight of the passengers
is a minor concession without substantial impact on either passenger service or safety, so it doesn't really figure here.
of any kind within the workforce through "diversity training" is a completely obvious HR
improvement and not a concession of any sort.
I'm not saying the overall result is terribly consistent - but I can understand how they might have come about, up to a point.
The fact remains that a consistent position will require a bit more than just mixing the end result of various concessions to pressure groups.
On the other hand, the artificial and predictable outrage of western
religious pressure groups in such instants is rather disingenuous and the attempts to mix prevention of harrassment and the denial of extra concessions for religious demonstration are more than just a bit twisted with a distinct odor of the dark ages...