Thanks @noflynomore and @Huntaway.
The rumour I heard was that noise cancelling headphones will allow you to hear ATC clearer, and therefore making it easier to understand what you need to do first time round.
Because there are so many different models available, I thought the DC headsets would be okay, but shall have a look at the Peltor ones.
Should I buy brand new or are second hand headsets equally as good? Needless to say, I don't have £000's sitting in the bank — despite being 26 and deciding on a change in career from accounting to being a pilot.
Haven't actually been up in a light aircraft before so don't know how loud/quiet. My first trial flight is tomorrow, really looking forward to it.
Thanks.