I think you are neglecting a few things here, namely that most Muslims are not trying to come here to take over our country while there may be a minority who actually are actively involved in promoting terrorism and have expressed radical sentiments, i'd contest the majority of Muslims who come here want a life of more freedom, and independency, and are not part of a covert mission to 'Islamise' the UK.
Let us suppose there is a request for an imposing mosque in some UK town. Let us suppose that all those Muslims making this request, the prospective congregation and the imam who preaches there genuinely reject sharia to a man and woman as an outdated system that has no place in ANY PART of today's world. A difficult thing to believe, sure, but let us suppose it is true. In building this mosque these sharia rejecting "Muslims" are STILL helping to set up the infrastructure of an Islamic state - of which mosques are an inherent component. There is no reason to believe that this mosque would forever remain a place of sharia-rejecting Islam. As it is a mosque congregation composed mostly or largely of principled sharia rejectors takes a great deal of suspension of disbelief!
No one is oblivious to the reality that moderates are being radicalised in Britain, but do you really think the media (especially the express) is going to report the less dramatic headlines of moderates and liberals assimilating and integrating into western norms a.k.a Muslims getting on with their day to day lives, not harming or bothering anybody and trying to do something positive for society.
Why should they report that any more than report that the Guardian or Independent should report that the "vast majority" of British National Party members do not engage in racist attacks on ethnic minorities or carry placards loudly advertising their racist views and ideals and expect the reader to conclude that most BNP members are anti-racists?
Most of them don't want shari'ah law here.
According to
THIS article 40% of Muslims asked expressed a desire for sharia. And that's just the HONEST ones. Now imagine if the number of people who call themselves "Muslims" in the UK amounted to 5X the current level.