In deals as you need to buy the mag.
Grab November's issue of Cosmopolitan (£3.40, out on Mon 11 Oct), and with it you'll find a free full size Missguided nail varnish. The mag's on sale until Mon 8 Nov.
The varnish is worth £5 and comes in three colours: nude, pink and black with glitter.
In the mag there will also be a voucher for 20% at Missguided.co.uk, valid until 30 Nov.