Hi there
It is always a difficult time of year if you have not budgeted for Christmas, but your IP is unlikely to be too sympathetic to you missing a payments just because of over-spending.
I warn all of my own clients that it is not permissible to use Christmas as an excuse - you simply have to set aside monies during the year if you wish to do the spending.
In answer to your question, if you cannot make up the arrears over a couple of months you will be one month in arrears, and presumably you have the usual 3 missed payments and you are in default ruling. I would really urge you to try and make ends meet without missing a payment if you can help it.
Sorry if that makes me seem like Scrooge.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
See customer feedback at:
http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp