wowzz
Sorry you had a disrupted flight.
EU261/2004 stipulates the compensation for denied boarding (there are no extra ordinary get out clauses for denied boarding, unlike cancelations and delays.)
A quick look at the internet suggests that the flight distance from ALC to STN is between 1516-1570km, which is significant, as there is a break point at 1500km.
easyJet have to pay you, within 7 days, any flight refunds due plus 400€ per person.
This is the wording of the particular part of the regulation
- reimbursement of the cost of the ticket within seven days or a return flight to the first point of departure or re-routing to their final destination;
- care (refreshments, meals, hotel accommodation, transport between the airport and place of accommodation, two free telephone calls, telex or fax messages, or e-mails);
- compensation totalling:
- EUR 250 for all flights of 1500 kilometres or less;
- EUR 400 for all intra-Community flights of more than 1500 kilometres, and for all other flights between 1500 and 3500 kilometres;
- EUR 600 for all other flights.
The reference link is
Denied-boarding compensation system