As well as filing tax returns in UK US and Australia many clients need advice on financial planning. Many financial advisers are unable to offer support to individuals who are US citizens because of the complex US rules on "foreign" including UK income. We can offer a specialist service to assist.
The US system has many anti avoidance rules designed to prevent US tax payers reducing their tax liability by investing in countries other than the US. Unfortunately, when you are UK resident individual income which you think of as local investment income in the UK is treated as foreign income in the US and subject to very challenging regulations.