Don't do shares mate, too expensive and risky for the novice investing small amounts of money.
Much more sensible would be to drip feed into a Stocks & Shares ISA. If you've put money into a Cash ISA this tax year, you'll be able to invest up to £5,760 (equivalent to half the annual ISA allowance) in a Stocks & Shares ISA. If you haven't done a Cash ISA this tax year, you can invest up to £11,520 in a Stocks & Shares ISA.
Drip feeding your money in, as opposed to investing a lump sum, means you won't be investing at the wrong time (top of the market). It also means you won't be investing at the exact right time (bottom of the market). But as no one can guess which way the market is heading, drip feeding is the 'safest' way to get your money in.
What to invest in depends on your age, attitude to risk and objectives. As I don't know these, I'll just give some general ideas using the Hargreaves Lansdown (HL*) site - and specifically the funds that HL rate highly as to show you all funds would just bewilder you:
- Income funds (a core holding for any type of investor; you don't have to take the income as income, you can have it reinvested).
- Global and Specialist funds (higher/high risk but potentially high returns, for the more risk tolerant investor with a long time horizon, ideal for drip feeding in money as the risk is spread in small amounts over the period of investment. I have invested in quite a few of these. There are other areas not in that HL list, such as healthcare, technology, Japan, the Far East, North America, Europe, and so on (these last four are in country/region sectors in the fund categorisation.))
Lump sums can be added to any fund at any time - a good strategy if there is a market collapse as the time to buy quality funds is when everyone is doing a fire sale on the underlying shares.
* I invest with HL, which is my only connection with them. Very pleased with their services, costs and value though - well worth looking into as they rebate a lot of their initial commission and some of their annual commission, thus increasing the amount that gets invested, which means much better returns for the investor over the long term.