Dr Ericsson also argues that 'if you do not allow people to take advantage of it, they will seek it elsewhere'. This argument is a subterfuge. It is reminiscent of British firms producing torture equipment for export: if they did not do it, companies from other countries would, and would gain the profits.
You report that 'Doctor's say many Asians value boys more than girls'. Perhaps, but so too do many Europeans. The historical repercussions of primogeniture and institutionalised sexism (eg women in the UK not obtaining the vote on the same terms as men until 1928) still affect much parental thinking.
If sex selection clinics do become common in the UK, they will not so much originate a problem as allow existing prejudice to become manifest. It must be very doubtful whether legal prohibition of such clinics would help in any way to eradicate sexual prejudice. Law is not an instrument of education.