The 2011 Census allowed respondents to choose between any number of multiple ethnic identities although in reality very few opted to do so. In the Radnorshire communities the great majority chose a single identity and that meant choosing between a Welsh-only, an English-only, or a British-only ethnicity.
The British-only identity trailed in third. Only in New Radnor (31.8) and Whitton (31.9) did Britishness emerge as the most popular choice. In a number of communities (see map below) the British-only option dropped below 20%, although mostly the score was a respectable figure in the twenties - 22% in Knighton, 26% in Presteigne, 24% in Llandrindod for example. So who were these Radnorshire Britons?
Turning from ethnic identity to place of birth we find that only in 11* of Radnorshire's 27 communities did the Welsh-born outnumber those born in England. This is partly explained by the use of Herefordshire maternity hospitals although it's clear that this has had only a negligible effect. The real reason is, of course, in-migration.
When we compare the ethnicity chosen by the Welsh-born and English-born we find an interesting contrast. Below is a table showing how the Welsh-born are far more likely to opt for a Welsh-only identity.
Welsh-only/English-only identity shown as a % of the Welsh-born/English-born for the 27 Radnorshire Communities:
The English-only identity choice is lower than the figure you would expect from the number born in England because substantial numbers of in-comers opted to describe themselves as British-only. The locally born were far less likely to do so. Conclusion: In the 2011 Census for Radnorshire at least Britishness is essentially Englishness dressed up in a more polite garb.
* Rhayader, Abbeycwmhir, Aberedw, Glascwm, Llanbadarnfynydd, Llanbister, Llanelwedd, Llanyre, Penybont, St Harmon and Glasbury.