The 2026 Aberdeen South by-election, triggered by SNP MP Stephen Flynn’s resignation after his election to the Scottish Parliament, features Richard Gordon Thomson as the SNP candidate. Thomson, a former MP for the neighboring Gordon constituency, benefits from the party’s established local organization and the seat’s recent electoral history. The contest has centered on North Sea oil and gas policy as the dominant issue, with traders pricing in an SNP hold at high implied probability. Conservative candidate Douglas Lumsden and other contenders trail significantly in market pricing, reflecting limited evidence of a shift in voter coalitions or turnout patterns ahead of the 18 June poll. Market odds remain sensitive to any late shifts in energy-related messaging or participation rates.