I'm getting married this year and my fiance and me both wrote our own vows for our civil ceremony. We had to visit the registrar to discuss the details of the day and pay the fee for the registrar's attendance. We are keeping the vows secret from each other so they have surprise on the day.
In my vow I had included the words "though good health and poor.". The registrar deemed this as too religious for a civil ceremony and asked me to change it immediately. I still don't think my words were religious, they were only passingly similar to a religious sentiment, which is something that could be said true for the very act of marriage.
On the spot I switched it to "through darkness and light" which sounds more religious to my mind...
My fiance had similar trouble with a line in her vow.
The system here is awful. Civil ceremonies ought to be free of religious obligation rather than free of religious reference.
When we asked why we couldn't make similar sentiments to religious phrases the guy basically told us that the answer contained massive spoilers and we'd do better just to get on with it and we'd find out later.
What a load of bollocks. Thank fuck they approved the poem my fiance had written and put in the readings which was about a "divine tree".
I can imagine Church of England negotiating with the country like "Hey, if you want civil ceremonies you can have 'em but they've got to be totally non-compete on anythin' we offer under our holy roof! If people want to say shit about wealth, health or having and holding you gotta kick those guys out and send 'em our way!"