I was reading a report on religion an it says that there is a decline in traditional churches believers and there is also an increase in non traditional beliefs like Islam.
Well, the UK is a free country and there is freedom of religion but when exercising this right you can't violate other peoples's rights.
I am a fervent Catholic and I am also a sinner. I will try to teach people in small groups like ancient Christians did. I would try to convince people personally and I think is the best thing to do. I woundn't try to do something to be expulsed of that country for breaking a law.
In my private business there is a constitutional right to talk about religion but I would try to be more like Jesuschrist which appealed more to your heart and didn't impose anything to anybody.