Close Brothers 4.5% 2Yr / 4.75% 3Yr Fix

In my mother's will, each of my children receive £10,000 when they reach 30. One will be 30 in 7 months and the other in 26 months. Where can I place the money? As mentioned in various threads, any accounts with decent rates of interest are not available to Trustees and as the money has to be handed over (in one case) within a year, 1 year bonds/fixed rate deals are not appropriate. I suppose for the younger child, I could place the money in a 2 year bond now (if I can find one for Trustees), but it is the elder one's inheritance I am particularly worried about at present... Any suggestions?