Hi im new to BYC, as well as posting in general.
RobbingPeter your little BLR wyandotte is a bute for sure, now im not an old pro breeder of wyandottes, and I haven't raised BLR's before either and It's always hard to tell with young chicks. I usually evaluate my chicks for show quality once theye have pased the "teenage stage" and nearly adults.
So far her color and lacing looks good, could use more lacing on her cushin (feathers before the tail "saddle" on a male bird) type wise, it's hard to tell type when theye are young, but to me, it looks as though she may have a fairly flat back with a some what abrupt tail base, not really a nice gental sweep simalue to some cochins.
As I've said in my opinion I think it's to early to tell for show quality, my advise would be to raise her up a little more and evaluate her later.
If your serious about show quality, attend more shows, talk to judges, and I recomend looking into a APA or ABA standard. Good luck with your chicks and I hope to see an updated picture when shes older.