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The Legal Framework of "Holding Two Passports" Neither the UK nor the U.S. requires a citizen to renounce their original nationality upon acquiring the other. In 2026, the "Oath of Allegiance" taken during the U.S. naturalization ceremony is understood as a commitment to the U.S. Constitution without requiring the forfeiture of British protected status. At Crownside Legal, we provide an authoritative "Eligibility Audit" for our usalaw.co.uk clients. Operating as a bridge betw

A guide to E-2 capital thresholds, proportionality, at-risk expenditure, non-marginality, and London-post evidence for British treaty-investor applicants.

A guide for British entrepreneurs and investors acquiring an operating US business or franchise through an E-2 Treaty Investor visa strategy.

A strategic guide for British entrepreneurs, technology founders, and scale-up innovators considering the E-2 Treaty Investor visa to establish and direct a US enterprise.

A guide for British professionals, remote workers, and employers assessing the US immigration, corporate, and tax implications of moving UK-based remote work to the United States.

A legal guide for British executives, founders, scientists, and industry leaders seeking US permanent residence through an EB-1A extraordinary-ability self-petition.

A comparative guide for UK degree holders, academics, researchers, and medical professionals weighing cap-subject and cap-exempt US H-1B specialty-occupation options.

A comparative guide to the US O-1 visa and UK Global Talent visa for elite technology professionals, founders, and creative talent, covering speed, sponsorship, work freedom, settlement, and family rights.

A legal guide for UK professionals, researchers, engineers, and entrepreneurs seeking US permanent residence through an EB-2 National Interest Waiver self-petition.

A strategic guide for UK software engineers, AI and machine-learning specialists, engineering managers, and tech founders comparing O-1A, L-1, H-1B, and E-2 US visa routes.

A guide to IR-2, CR-2, F2A, and K-2 immigration routes for British and foreign-national children relocating to the United States through London consular processing.

A guide to Form I-864 income thresholds, UK savings and property, the three-times asset rule, foreign income, joint sponsors, currency conversion, and US domicile.

A practical guide to immediate work rights, Form I-551 passport evidence, Form I-765 EAD timelines, remote-work issues, and Social Security Numbers for UK spouses moving to the US.

A step-by-step guide for UK-based applicants seeking a US CR-1 or IR-1 marriage green card through USCIS, the NVC, and the US Embassy in London.

A side-by-side legal comparison of the K-1 fiancé visa and CR-1 immigrant spouse visa for British citizens relocating to the United States.

A side-by-side comparison of US marriage green card and UK spouse visa costs, processing timelines, income rules, work rights, and settlement pathways.

UK spouse visa income rules compared with US CR-1 options, including Form I-864, joint sponsors, assets, and consular processing for transatlantic couples.

The 2026 UK ETA: A New Requirement for Expats As of early 2026, the UK government has mandated that all non-European visitors (including U.S. citizens) obtain an Electronic Travel Authorisation (ETA) before flying to London. The Dual Citizen Trap: If you have naturalized in the U.S. and typically travel on your U.S. passport, you can no longer apply for an ETA because the system recognizes your British citizenship. The Solution: You must ensure your British Passport is curren

Defining "Extraordinary Ability" for the British Arts For a British creative, the O-1B does not actually require a Nobel Prize or an Oscar (though those certainly help). Instead, you must meet at least three of the six regulatory criteria defined under 8 CFR 214.2(o). These criteria are designed to capture a broad range of high-level achievement in the arts. At Crownside Legal, we specialize in translating your London-based accolades into the specific "evidentiary clusters" U

The U.S. Tax Residency Trigger In 2026, the U.S. tax net is incredibly wide. Once you move on an L-1A or E-2 visa, the IRS doesn't just care about your U.S. salary; they care about your London rental income, your dividends from a UK Limited company, and even the growth in your investment portfolios. At Crownside Legal, we coordinate with specialist cross-border accountants to ensure your "Date of Entry" is strategically timed. Operating as an authoritative bridge, we help you