can up transfer £100 or just leave it?

I left the NHS to work in a nursing home for about 6 months. in that time i contributed approx £100 to NOW:pensions. I am now back in NHS pension and recieved a statement from NOW last week and was wondering if the £100 I paid can be transferred into my NHS pension? If it can does it cost anything. it's only around £100 so no point spending out for a tiny amount.