The cheapest way to transfer the money would be through a good currency specialist, the most expensive way would be with a bad one and the safest way is through your banks.
For advice, you can either talk to the Inland Revenue (their call centres tend to be very helpful) or you could appoint a tax specialist from an accountancy firm to give advice. Generally the larger the accountancy firm, the more expensive the advice.
In my view, you should be honest about the situation and should not start trying to pretend that the money is a gift.
I am not going to guess at what taxes will be payable in which country. You should talk to an expert for that.