Media access is more than just having insurance, you need to prove to the circuit that you being that will be of value to them in terms of bringing them coverage in magazines.
Which venues have asked for proof of publication?You are right as some venues or events want proof of your work being published. However, in my case and the venue I was hoping to go to, when I spoke to them today all they wanted was Public Liability cover.
As others have said PLI alone is unlikely to get you "infield" and even if it does don't think you can just go where you like when you like.A little bit more digging around on the internet came up with www.ripeinsurance.co.uk who can provide Public Liability only on an Amateur status for £41 (£1 million cover), £49 (£2 million cover), £73 (£5 million cover and £101 (£10 million cover). They also give a 10% discount for members of certain organisations/bodies e.g. RPS.
I'll have to have a think about that one as I only go to 3 or 4 events per year so I'll have to weigh up if it is worth £25 to £35 per event for me just to get on the infield.
As others have said PLI alone is unlikely to get you "infield" and even if it does don't think you can just go where you like when you like.
The fact I am typing this probably means you don't really have an idea of what is involved. Sorry if that seems a bit harsh, but when you have had to do CPR on so called media you will perhaps understand.