what does bump mean?

Hello all, Have been reading the threads with great interest - Heres my plea for advice! Have a mort with nationwide currently and in a suspended repo order to the tune of £1566.19 pm - £1066.19 is mort repayment and £500 is arrears pm. Unfortunately I went to court not armed with anything more than good intentions and wanted to clear the arrears as soon as possible! I had just started a new job and part of my income is commission related after being out of work for 5 months and was confident that the money would be there however it has turned out that it isnt, so I am on a basic wage of 16,000 and my partner at 20,000 which gives us a net income of approx £2350 pm. You can start to see the problem! I have othe commitiment such as child support £300 pm, utilities £211 pm and other consumer debts, to be frank I dont know how I hae managed he last 4 months paying this level of arrears. I spoke to the ccc and they suggested I fill in a n244 and submit to the court for another hearing to reduce the arrears payments which is something I will do immediately, I was hoping to offer £100 per month as arrears payments, Do you think that is realistic? Also I still have to pay Julys payment, I was hoping to pay the 1066 + 100 pounds towards the arrears, I have spoken to nationwide they would not negotiate with me they said I have to go through the courts, If I do this I will breaking the order and will that look badly on me when I go to court to reduce the cost? This is doing my head in, truly and does anyone have any resource for assistance in filling in this n244? Any assistance would grately appreciated, I really mean that