I want to post a large letter, 2nd class, without the need in going to the post office.
I understand a large 2nd class stamp is 83p but the cost of posting my large letter that weighs 130g is £1.32.
Can I put a large 2nd class stamp on my letter (83p) along with a standard 2nd class stamp (61p) which totals £1.44 & exceeds the cost of £1.32 - onto my letter & it'll still be treated in the same way as a large letter, sent 2nd class?