Now the Netherlands is a country devoted to horticulture, and very good at it ; it amounts to 1/3rd of their economy !. A lot of horticultural producers who would not know the difference between an orchid and an onion jumped on the bandwagon and started mass producing other orchids , and not knowing anything about them, called them all by the same name - Cambria. Incidentally Plush is a village 20 miles away from where I live...an old friend now at the end of his life ran a nursery there, and Cambria was among the plants he started off with - it came from a big collection owned by a very rich man who had race horses, an estate, the works..
Culture ? They are thin leaved plants, with small diameter roots, which means that they must be in very well-drained compost, so as to never get very wet ( or the roots will rot) but at the same time they should never dry out. Bark is fine, but maybe add a bit of coarse Perlite and/or charcoal . The parents mostly come from high altitude South American rain forest - not ultra high altitude , but higher ( and therefore cooler) than cattleyas. Well grown in UK - usually a cool country, Oncidiums especially those based on what used to be called Odontoglossums , complete a growth and flower and rest cycle every 9 or 10 months , so they flower earlier and earlier each year.Of course they also love our cool weather, and noticeably do much better in the North of England than they do in the south - they will have hated our recent heat-wave - temperatures above 25 C. in the shade for a whole 15 days plus... but it is due to start raining tomorrow, thank goodness - my garden can't stand all the heat.
Hope this helps.