overpayment help

berserker

Hey guys,

Need help on options for overpayment.

Current situation, have 90k left to pay off, mortgage is coming up for renewal next year.
If nothing to drastic happens should be able to lock in a 1.89% rate for next 5 years.

Soooo overpayment.

1. I have 11k saved up that i can overpay on mortgage or try and get a better interest rate.
2. Currently overpaying £600 a month on mortgage.
3. I have bank accounts that yield 5% but have a capped £250 a month input.

Need thoughts on the below

a)Am i better off using the monthly overpayment and put it into the high interest accounts and pay off a lump sum of mortgage at end of 12 months when interest comes in? Whilst interest rate beats mortgage rate.
b) should i use the £11k to overpay the mortgage as its unlikely that i will find a better interest rate.

thanks for any help