Sorry if any of these have already been posted...

[miss_lon]

http://www.elizabethardenceramide.co.uk/mascara/voucher/index.php (mascara voucher)

http://www.exclamation-games.com/samples/exclamation.html (perfume sample)

http://www.nivea.co.uk/highlights/product_special/nvs_young_range (Nivea young sample)

http://www.rimmellondon.com/UK/promotions.aspx?id=2 (free foundation FULL SIZE!)

http://www.narscosmetics.co.uk/tubesignup.aspx (Nars lipgloss sample)

http://survey.email.coty.com/sensorpro/survey/templateblankrun.aspx?surveyid=0ba881d4-eb97-413c-b76c-a4702b57457e&pageid=eb0728c1-d763-4c5c-87d0-f420093d37fc&ox=coty (free Rimmel nail polish)

https://www.growmorethancoffee.co.uk/form.aspx (free coffee)