Your UK ETA, filed by Num.
Fill this in once. A NUM person files it on www.gov.uk for you, usually within a few hours.
NUM’s fee$9.99per traveller
United Kingdom government fee£20$27.50 at cost, per traveller
NUM is not the United Kingdom government. You can apply yourself on the official site for the government fee alone.
Official site. NUM charges $9.99 for the time, and the decision is the government’s alone: nobody can promise approval or speed it up. Not for British or Irish citizens. The decision goes to the traveller's own email.
Decision: Usually within a day, up to 3 working days. Valid: Two years, multiple trips.