Hi Puhi, I'm not touching your sex question with a 10 foot pole.
But yes the British Standard does include a crest, and in fact they are breeding towards a rather large crest there. You can read in the thread where we fashioned the proposed US standard, post number two lists the British standard. https://www.backyardchickens.com/t/713115/cream-legbar-working-group-standard-of-perfection "Crest cream and grey, some chestnut permissible." appears under both male and female. It does not specify size. The proposed US standard under "male" reads, "Crest: Small, well back from the eyes with narrow feathers falling off the back of the head to below the blade of the comb." Under female it reads, "Crest: Medium, affixed at the forefront of the skull on both sides of the base of the comb and running length of comb. Rising well in front so as not to obstruct the eyes, with feathers narrow and falling off the back of the head to below the blade of the comb. "
Although they are supposed to be good layers, it is hard to get a number pinned down. I have heard everything from 180 up to 210 or so. In good laying season I'm getting 5 eggs per week from each hen, and I am pretty pleased with that. I have not had any Cream Legbars go broody yet, either, which affects those yearly numbers. It's something we won't know for sure for a few years even if we asked everyone in the UK because our stock is different in many ways from their stock.

But yes the British Standard does include a crest, and in fact they are breeding towards a rather large crest there. You can read in the thread where we fashioned the proposed US standard, post number two lists the British standard. https://www.backyardchickens.com/t/713115/cream-legbar-working-group-standard-of-perfection "Crest cream and grey, some chestnut permissible." appears under both male and female. It does not specify size. The proposed US standard under "male" reads, "Crest: Small, well back from the eyes with narrow feathers falling off the back of the head to below the blade of the comb." Under female it reads, "Crest: Medium, affixed at the forefront of the skull on both sides of the base of the comb and running length of comb. Rising well in front so as not to obstruct the eyes, with feathers narrow and falling off the back of the head to below the blade of the comb. "
Although they are supposed to be good layers, it is hard to get a number pinned down. I have heard everything from 180 up to 210 or so. In good laying season I'm getting 5 eggs per week from each hen, and I am pretty pleased with that. I have not had any Cream Legbars go broody yet, either, which affects those yearly numbers. It's something we won't know for sure for a few years even if we asked everyone in the UK because our stock is different in many ways from their stock.