This is one for the internet geeks out there. 'Anonymous' has been in touch:

'I've emailed you a little message. A little game to play. I do like games.' And he has, indeed, emailed me.

'Dearest Sherlock

A Roman Emperor will help you work out what this means.

DSPCWZNV T LX HLENSTYR JZF

xx'

Obviously, it's a secret code. See how you get on. I'll post the solution later in the week.

Thanks. Sherlock

SOLUTION
This is one for the internet geeks out there. 'Anonymous' has been in touch:

'I've emailed you a little message. A little game to play. I do like games.' And he has, indeed, emailed me.

'Dearest Sherlock

A Roman Emperor will help you work out what this means.

SHERLOCK I AM WATCHING YOU

xx'

Obviously, it's a secret code. See how you get on. I'll post the solution later in the week.

Thanks. Sherlock

Solution:

SHERLOCK I AM WATCHING YOU

This is a Caesar shift cipher! Simply replace each letter in the message with the letter that is 15 places further down the alphabet. Find out more about the Caesar cipher on Wikipedia