Is this a temporary or permanent position? <a href=" http://www.globenergia.pl/zoloft-insomnia-go-away.pdf ">buy sertraline online no prescription</a> The RMT is not the only union to invest in the stock market. Unite, Britain&rsquo;s biggest union and a major donor to the Labour party, holds £33.4m of shares, generating dividends last year of just over £1m. It does not declare which companies it invests in.