Is this an oncidium?

[Kerry]

Hi, sorry to be a pain but I hope someone out there can help. My husband is coveting an orchid owned by his uncle, who has kindly sent us a picture. However, it arrived today too late for me to take to the orchid show at the weekend to try to find out more about it.



Can anyone help me identify it? I was thinking it might be an oncidium, but I have no confidence in my guesses and due to the huge variety in hybrids I am getting extremely confused.

Thanks in advance....