honestly, i'd say you don't really need a financial advisor beyond the initial CGT part, and maybe even not for that.
in the long run, you can live for life on this money easily if you put it in a low cost index fund - even a conservative fund. Just open an account with a broker and transfer the cash over. See the moneyvator broker list to choose one - though i'd go with vanguard directly in this case.
each year you can take out 11.3k (CGT limit) tax free, and pay CGT rates on the rest.
I've written some previous posts about large sums that you might find useful;
https://www.reddit.com/r/UKPersonalFinance/comments/589lej/i_won_the_lottery_1m_advice/d8ykakr/