Corporation tax on Capital Gain with deferred consideration

Dear all,

I was wondering if anyone could point me in the right direction.

I have a client trading through a limited company (Co 1). The company sold goodwill (ie. clients) to another company (Co 2). Co 2 has agreed to pay £120k over 5 years. 

My questions are:
1) Does the total £120k need to be shown as a capital gain on the CT600 in year 1?
2) If so, is there any relief for the fact it is payable in instalments?

I have come across TCGA92/S280, but I'm not sure if this applies only to individuals.

Many thanks in advance for any help.

Andrew