Hi Jack,
Having shopped around for the best cover/deal, we went with these guys for both PLI and Instrument Insurance.
[url="http://www.insurance4performingarts.co.uk/"][font="Arial"][color="#0000ff"]www.insurance4performingarts.co.uk[/color][/font][/url]
[font="Arial"]Great to deal with and really helpful. Other than getting it free with the Musicians Union, (which would mean joining), this was the best deal by far.[/font]