i have just been promoted and have 'spare' £100 a month (trying not to waste it)
Have got a choice - pay it off motgage each month (mortgage rate 5.5%) or my bank has offered a 7% savings scheme for a year (account closes at end of year and 'funds' transfered into an account of my choice)
thinking of investing in the savings scheme them at end of year putting all the money save/intrest into mortgage account
any thoughts?

If you're a lower rate tax payer the bank account gives you 5.6% after tax, higher rate it's only 4.2%. If you've already got an emergency fund equivalent to 3 month's salary then I'd pay it off the mortgage, you're not tempted to spend it then and it's a great feeling to pay off your mortgage early!