I've just spoken to the people at the Olive Grove Studio. They decided not to take my work. The feedback I got was that the articles would be too expensive for the clientele which they attract. They could appreciate the amount of work which goes into my handspinning and dyeing, but the bottom line is, they don't think it would sell.
I'm disappointed, of course, but at least I know now. I'll have to have a think about it and see if there's anything I can do differently. Ideally I need to find people who like what I'm doing and are willing and able to pay for the time, effort and skill involved.