Speaking about this specific context, I’m not sure why a non-religious (note: not an anti-religious) promise would not be every bit as valid a promise to make for believers as the present one. The only exception I can think of might be people who have a psychological compulsion to swear everything to a god and I’d have deeper concerns about them and their families.
There would be no losers except those who feel they must promote the idea of a god at every opportunity rather than accept that their particular beliefs are far from universal and that an organisation which accepts people from the whole range of beliefs in this society should adopt practices which embrace that.
[quote=“glass half empty 2” post=3067]Would a fully secular society still allow people to openly practice their faith and hold their beliefs?[/quote]A secular society (or organisation) would build its practices without bias or privilege accorded to any set of beliefs and would aim to treat everybody equally. Religion is a personal matter and can be practised without interference except where those practices are in contravention of national law (examples in the UK would be corporate discrimination, child torture, slavery, animal cruelty; in france you might include the wearing of veils)
One person’s religious beliefs should not be forced upon others who do not share those beliefs (forcing all women to wear veils, prohibiting shopping on Sundays, banning prayer breaks for muslims, requiring someone to work on their sabbath or holiday)
Of course some religions have policies which put them in direct conflict with others and this is because they are serving their own interests and trying to seize as much power and as many members as they can. Other individuals take it upon themselves to assume some “requirement” which doesn’t truly exist: while seikhs are required to wear the 5 Ks (even then the turban should be removed where safety takes precedence) we now have christians claiming that they must openly wear crosses as jewellery when there seems to be no such “requirement” in their doctrine). That is actually nothing more than a political statement.
[quote=“glass half empty 2” post=3067]I still fully believe that the notion of secularism in the UK is purely a vehicle to target the established church[/quote] It targets the “established” church because in a secular society you do not have an established church; establishment meaning it is bound into the political world in the way that the CofE is. Disestablishment of the church is a key goal for the secular movement as it conveys an unfair position of privilege to one set of beliefs.
What secularism does not do is specifically target the CofE as an entity, nor any other religious organisation, except when there is an attempt to grant specific rights or privileges over and above every other member of society or which are contrary to national law.
[quote=“glass half empty 2” post=3067] and not secularism in the broader sense, because the broader sense will mean getting into some tricky areas as I say brought upon us by human rights legislation.[/quote]Lets get into them and challenge them. There are clear areas of conflict between differing sets of beliefs and they cannot all be reconciled. I believe the human rights laws are written too broadly and allow practices to continue which cause genuine harm and until these are challenged and amended we may never improve the situation.
All of this is way way beyond the very simple suggestion of having a promise which does not alienate anybody with a particular belief.