tabetha - that all depends on the insurer, not the windscreen company. If you are with Direct Line and they say your excess is £60, then it's £60 - if you're with Admiral and they say it's £75, then it's £75. If you are one of the lucky few that get a £0 excess, then thats upto the insurer - excess costs aren't something that windscreen companies can change or modify - it's actually printed on your certificate of insurance
starturbo - Probably Patent Part screens - aftermarket affairs. From time to time we do see screens, and door glasses, that might be a mm or 2 too short or sometimes too big. The heater elements are tiny thing wavy lines inside the screen. On some screens, usually for older cars where the only screens available are patent part jobbies, you can often see a silver - almost tinfoil like - strip down each side, which is where the connector terminals attach. Main reason for this is cheaper cost making em - there's not a lot of money in older screens these days, so the patent part companies make em as cheap as poss.....