This is the age old question of risk versus return. Everyone wants high returns without taking any risk, but unfortunately this is just not how investments work.
Your company pension fund trustees should be able to direct you to their financial advisor who can run through a risk profile exercise to determine your tolerance to risk, this will drive the asset allocation that you should look to achieve through spreading your pension across various asset classes (property, cash, equities and fixed interest being the main classes).
It is impossible to guess which asset classes are going to perform better than others and the best route is to diversify so you don't place all of your eggs into one basket. Many investors behave in the most counter-productive way possible by selling once they have seen a loss and then waiting for the prices to rise before re-investing; in no other aspect of their lives would they behave in such a way. For instance, before making a major purchase for the home would we not wait until the sales, where prices drop, before looking to buy? I know I certainly do. You will be purchasing your units in your UK equity fund from your monthly contributions at a 10% discount compared to last year so as and when things improve, would this not actually good news? Perhaps.
As you still have a long way to retirement you can afford to be more adventurous than someone close to retirement, but only you will know how much risk you are prepared to take. Don't forget that investing in a UK FTSE tracker fund is practically a global investment with a UK outlook anyway; have a look at the companies in the FTSE and see how much of their turnover is derived solely from their UK activities.
The Eurozone 'crisis' is vastly overhyped by the media. It is a liquidity problem and not the end of the world as we have been led to believe. Overall, the Eurozone is predicted to grow by around 3-4% in 2012; not the Armageddon some have been predicting. The main problem is that stock market valuations are based as much on speculation and sentiment as they are on physical balance sheets; when investors get jumpy the markets hop around all over the place, as we have seen. Greece will probably end up leaving the Euro zone and some French banks will get hit hard by the default, but as most of this is old news I would be surprised if any fund managers had exposure to any of this in their European funds.
Emerging markets growth is to slow as they tend to manufacture goods bought by the belt tightening western economies but are still going to provide better growth potential than the UK for instance.
Each and every investment opportunity carries a risk, and unless you are willing to pay for advice, you should diversify as far as possible by having some bonds (which are loans to companies like Woolworths so are not totally safe either) and equities.
Hope I've not confused you too much and feel free to fire back at anything you would like clarification on.