score:4
Just as a confirmation:
My visas arrived today and they indeed billed everyone 25GBP, they even included receipt per person....
This totaled: ((£25
(visa fee) + £10
(fee to throw our passports back into postage box)) x 1.125 (postal order that is the only way to pay fee 12.5% on sum sent) + £6
prepaid envelope) x 4 (persons) = (£39.375 + £6
) x 4 = £181.5
Note: Although it is required to send prepaid envelope per person they have sent all 4 passports in one prepaid envelope back... So maybe sending just one prepaid envelope could suffice...