This is there reply when I emailed them about this.
Dear Customer
Thank you for your email.
WHSmith aims to offer our customers choice, whilst striking the right balance and not acting as a censor. WHSmith seeks to do its best to satisfy all of its customers who often have strongly opposing views. We aim to display all of our magazines in locations where they are accessible to those who want to buy them, but do not offend those who do not. The till prompt system has been in place for many years on a range of different products and this has not previously been an issue for customers.
Denise Hughes
Customer Service Team Manager