Most accountants are technically competant at putting together a set of accounts and a tax computation. if you want a tax specialist you will bay 'big bucks' and you would have to have pre tax profits of at least £300k to justify them. The revenue however are continuing to crack down on tax loopholes and avoidance so even their effectiveness will be reduced.
The most important thing to consider is what you actually need from your accountant. Make a list of where he can help you and the benefit you would get from each requirement being fulfilled.
Make sure any accountant you engage can provide what you need in terms of business support and more importantly can you work with them. the personal aspects cannot be underrated.
Choose two or three accountants to 'interview' so that you get a good choice but do not be afraid to say no when they cannot provide what you want or you do not think that you can work with them.
Accountants, just like any other outrsourced service should be an integral part of your business!!
Finding a good accountant was one of the first things I did. Frankly, I asked local business owners that I know well and trust. I've been pleased with the result.
you must have friends who have done their tax returns... ask them who did it for them, accountants? were they good? this is usually a good way to find referrals for accountants