Yes, a US citizen can move to England. The UK is a very popular destination for Americans looking to live abroad due to its high quality of life and relatively easy access from the United States. However, there are certain requirements that need to be met in order for an American citizen to legally move and reside in England.
Firstly, you must have valid proof of identity such as a passport or driver’s license (with photo). Secondly, you will also need documentation proving your right to work or study in the UK; this could include student visas, work permits and other types of long-term residence permits. Thirdly, most people moving from the US will require some form of health insurance coverage once they arrive in England. Finally, if you plan on staying longer than six months then you may need additional documents such as marriage certificates or birth certificates proving family ties with someone who already lives in the UK.
Once these criteria have been fulfilled then it is possible for an American citizen to move and live legally in England - however it's important that all necessary paperwork is completed before travelling so that there are no issues at customs when arriving into the country!