@WhereDidTheYearsGo For me, the crux of your question is about whether you can afford to pay but are refusing to, or simply feel you don't want to. It comes over more as a moral question than a financial one. I pick up something from the tone of your first post that shows a certain hostility to paying towards the wedding and wonder if this is purely about money or there is a sub-text to it?
Clearly, private education will have cost hundreds of thousands over the years so you felt that was an investment and did it. Your income was presumably pretty high, so I'd assume you are 'comfortable' now too, as well as having decent occupational pensions.
I know that some of my DCs' peers ( friends from their uni days) have had weddings costing £50K! Their parents contributed to those.
I know of others where parents have said they can offer £xxx amount and would their child like it towards a property (paying off some of the mortgage) or a posh wedding.
You must be roughly my generation. We'd always assumed that parents would contribute towards a wedding if they could afford to.
I don't quite 'get' your question because it does come over as being stingy. If you can afford to pay something/ all, isn't this what you'd lie to do, to give your daughter a lovely day? And I don't mean spend £50K! Even a modest wedding.
I've never actually known any parents who, if they could afford to contribute, said they simply didn't want to, on the basis they had spent enough already.
Is there more to this than you are saying?