The situation in the UK is no different from anywhere else in the Western world. It is not normal to be a Christian in today’s UK, let alone to belong to the tiny minority here that is composed of Orthodox Christians.
The State ignores Christians and Christianity. We are totally irrelevant to it and its anti-Christian agenda. As far as they are concerned, we are an anachronism and we should die out and disappear as soon as possible.
Having said that, there is no active persecution as such, just indifference and underlying hostility, disguised by the hypocritical politeness typical of the British Establishment...
In the UK today, there are only really two forms of Christianity that are alive, both immigrant: Eastern European and Black African. The rest is fundamentally on its death-bed: it is far worse than ‘serious decline’...
Quite simply, Western people have lost their faith. Since Western civilization was founded on faith, this means that Western civilization is also on its death-bed. Western civilization is today just a series of historical monuments for tourists to visit: the soul has gone out of it.
I would also recommend perusing Fr Andrew's books - some of which are available online: