Kinver went into liquidation 2004, and Mike Davies retired.
Company was bought by Brierley Hill Crystal that year.
Brierley Hill Crystal was originally founded in 1913, as Brierley Hill Glass, and was sold in 1941, to Harold Breese.
It became BHC, but that went into liquidation in 2001. It was bought by one of Breese's grand-sons, who also operates Staffordshire Crystal, also at Brierley Hill. Kinver site is maintained to allow former Kinver customers to order replacement items etc.
The lady I spoke to suggested that Bill Swinswood was not an employee at Kinver. Cumbria Crystal seem to think he did not move to Ulverston in 1984.
Mike Davies may have connections to Broadfield House, so you might try there.
Back to you Frank, I've done my best.