Hi
This shows the differences in areas
I have never used a library for such things - they just don't seem to hold anything for my areas
There is a distinction between the lending library and reference library though, here in the Scottish borders my local town library is only a small lending library although the town is the second largest in the region.
The reference library is located ten miles away in a smaller town, combines lending and reference in a smaller building than my local site.
Lincolnshire has a couple of reference libraries but the main one is in Lincoln itself and only 200 yards from the county archives office and family history society.
As an afterthought, the price diferential i mentioned can sometimes be because of the way the electoral roll is displayed, it isn't arranged by name but by address, the initial problem is finding the correct ward that applies to an address then going through the ward street by street. Some streets are covered by two or more wards and can be difficult to trace easily, also ward boundaries changed over the years. All this adds time to the search process and when charged by the hour explains the price hike when the archives are involved.
I believe (possibly incorrectly) that the library either cannot make a charge for searching or has a maximum fee that can be applied due to some quirk of public access/funding reuirements.
Glen