Hi Nikster,
I am in a similar situation to you. But not able to invest as much monthly
However I have realised I am an awful investor and need the most hands off aproach possible. I am nearly 25 so I went with a vanguard lifestrategy 80% equity fund and will pay in £500 monthly for 25 years +, I should then be able to retire. I could pay in more but I am comfortable with this amount, and ill have a teachers pension incase this all goes wrong.
The vanguard fund is diversified and automatically rebalances, so no nasty meddling needed on my part. This is a great article from monevator in the UK which tells you about these funds .
http://monevator.com/vanguard-lifestrategy/Remember there is a ISA limit of just over £11,000 a year, so you might think about just filling this every year if you are just dipping your toe in the water rather than your £2000 a month which would take you over.
I invest through Hargreaves and Lansdown as they are the cheapest for a 1 fund portfolio. The monevator website has a cost comparison of all the different brokers in the UK, which can help you decide who to invest with.
Hope this helps and good luck.