There are quite a few versions of the 8823 it seems.
VDSL and ADSL Compliance
VMG8823-B10B/B30B: Support VDSL profiles: 8a/b/c/d, 12a/b and 17a
VMG8823-B50B/B60B: Support VDSL profiles: 8a/b/c/d, 12a/b, 17a and 35b
DSL
VMG8823-B10B/B50B: One RJ-11 port for VDSL (over POTS)
VMG8823-B30B/B60B: One RJ-45 port for VDSL (over ISDN)
So either a VMG8823-B10B or B50B would work in the UK. No idea if they have different chipsets. One would assume so with them supporting different profiles.
The website and pfd files also state:
WAN
VMG8823-B50B: One RJ-11 port for VDSL (over POTS)
VMG8823-B60B: One RJ-45 port for VDSL (over ISDN)
Which according to the supplied images is incorrect. On all 4 models the WAN port is an RJ45 port. Only the DSL port varies between models.