If your SWIFT payment is requested in the week (Monday to Friday) it will usually be processed on the same day, provided your request is received at Nationwide by 1:00pm on that day. If it's received at the weekend or after 1:00pm, it will be processed the next working day.
SWIFT payments within the European Economic Area (EEA) usually take 1 working day to reach the destination bank; but payments outside the European Economic Area may take longer. Payments to India can take up to 3 months and occasionally longer to reach the receiving account.