Lost earnings won't get very far, it's just EC261 delay compensation and Right to Care expenses. There are 3 things at play here, reimbursement, compensation and damages. The last is out of scope and the airlines act like hawks on that one. The other two are part of EC261. But you can put in for loss of earnings up to £95 (for making the MCOL application) and all set costs such as court fee. You can also claim interest at 8%