I have some money in an stocks ISA that has been sat there doing very little since I was 18. I was hoping to move it to get a better return and start paying into it on a regular basis.

There are literally thousands of products out there. Short of some very tedious research or paying a financial adviser is there a good website that offers comparisons based on past performance, fees etc. Looking for a fund rather than actually buying shares myself.

Bestinvest have just launched a product called select that is execution only, has plenty of research on the site.

Try hargreaves lansdown http://www.hl.co.uk/hargreaves lansdown
Make a choice from their top 150.