If you invest the lump sums in an ISA ( which will take more than 1 year due to limit) the income will also be tax free. If you are married use can use your wife's allowance as well.
Anyway the first £1000 of interest pa is tax free for a basic rate tax payer so unless you took the maximum lump sum and put it in a high interest, non ISA, account, tax on interest probably wouldn't be a factor unless you already have savings