A BRIDE-TO-BE was left red-faced when her wedding guests had to pay for their invitations.

Amy Crabb, 30, sent 40 identical invitations all over the country but just two - one in Weymouth and one in Portland - were held back when Royal Mail demanded five pence extra postage.

Miss Crabb, of Easton Street, Portland, wants to know why the invitation was posted to 38 guests with no problem - but held back from two.

She said: "It's very bizarre.

"My friend phoned to let me know she'd had to go and collect the invitation and was charged five pence plus a £1 admin fee.

"When you're organising a wedding it's the last thing you want to hear.

"I went into a mad panic and called everyone to say how sorry I was and to offer to pay them back but all but two said they'd got theirs absolutely fine."

Miss Crabb, who is marrying fiancé Chris Squibb in June, used the Royal Mail size guide which was sent out when postage changed in August.

The cost of posting a letter is now based not just on weight but on size as well.

She said: "I made sure the postage was right and put a first class stamp on them all."

Royal Mail spokesman Richard Hall said: "Without seeing the items it's difficult to give a definitive answer."

Mr Hall said the card could be on the borderline of two postage costs.

He added: "If we have surcharged in error we are concerned by that and we would refund the cost and also notify the officers involved."