I dont think the ID is correct. I think it looks like a odontocidium to me, I found this which looks similar to yours

I don’t fertilize much myself but most people agree that its better to do a lighter dose more often, maybe 1/2 dose monthly. I‘ve never tried orchid mist, I don’t see orchids as being big on foliar feeding. I have read that over fertilizing causes faster growth but makes the leaf surface thinner, which opens the plant up to disease.

I like the look of kokedama but when I tried it I found it difficult to keep up with. I think you would keep it from drying out completely watering twice a week or so.

I can see that the pseudo-bulbs are shriveled, and that tells me that the plant is not getting enough water; that might mean it it is not getting water frequently enough, and perhaps for not long enough.

When a plant is in a moss ball it will dry out more quickly than if it were in an ordinary pot. One must water more.

I usually fertilize orchids in their growing season one watering out of four. I feed full strenghth orchid food that is urea-free. I have no idea what ”orchid mist” might be, but it sounds like a scam. Why not use the food you already have?

On the ID, I can only say that here, the big orchid growing nurseries are very sloppy on tagging, and I see multiple tags on the same plant, and multiple plants with the same tag.

You plant is in the Oncidium alliance. Water generously.

Other than make a couple of very general comments, I'm going to stay out of this discussion. In my 50+ years of growing orchids, I never developed a great love for Brassia's for several reasons. I would suggest you go to a well stocked library and see if they have a copy, or can import a copy for you, of Alex D. Hawkes ENCYCLOPEDIA OF CULTIVATED ORCHIDS. This book is one of the standards for culture of a great number of orchid species. The section on Brassia's has a few pointers that may be helpful for you in growing one of the less commonly seen species of orchids. Brassia's include about 30 species, that are closely allied to Oncidium, and are found mostly in the tropical Americas. They grow generally under Cattleya conditions, are best grown in pots tightly filled with osmunda or shredded treefern, or firmly mounted on slabs. The plants do not care for the common bark mixes. I grew the vast majority of my orchids in pots with Fir bark mixes, and in my small portable greenhouse, could not provide the high light requirements for these plants. With the exception of Brassavola nodosa, which did well for me in the climate I could provide in my little greenhouse that got moved around the country every few years.

If you are new to this orchid culture adventure, my suggestion is to educate yourself, and learn to be the most inquisitive grower on the block. Fear of doing something "wrong" is your greatest enemy, and an abundance of curiosity is your greatest asset. Have fun!

Thank you so much for everyone’s replies - I think you’re right about it being an Oncidium. I do wonder if it’ll need more light than where it is currently, which is on a north east facing windowsill. My alternative is south west and that may be too much sun (particularly during the summer).

Unfortunately it looks like the flowers are starting to wilt (which i assume is the natural deterioration in their lifespan!) but a shame as i’ve only had it for 4 days! Who knows how long it’s been flowering for before that though, i think i read somewhere that they flower in the fall.

I had wondered about the shrivelled pseudobulb - is it likely to visibly improve with improved watering or is it likely to keep this appearance now?

Already learning a lot, @billsc! :)

Odontocidiums are among thte easiest of orchids to grow and reflower. I kept mine outdoors in a hanging basket under a tree. They grew gangbusters. Until they got filled with ant colonies, and then I had to throw them out!

As I recall, for the kokedama, I'd suggest finding a balance between letting it dry out a bit and keeping it moist to avoid root issues. It's all about finding that sweet spot!