The Cotwold Legbar is not a breed, but rather a hybird made from crossing the Cream Legbar with other breeds. The Heritage Skyline, Columbine, Fenton Blue, Fenton Rose, and Jasmine are other Blue Egg laying Hybirds that are sold in the UK. The different names are from different hatcheries but they all are about the same. About 80% of these Hybirds have the blue egg gene. Those that do lay eggs in colours from pastel blues to olive green.In Britian Cotswold legbars are not in their standard and are not considered Cream Lagbars... read the the last sentence in that... I have read and seen this in other sourses too... this is just one.... just just have to search for it.....
http://www.legbarsofbroadway.co.uk/the history/