2 yr fixed rate coming to an end - Santander

Hello

I am new to these forums to firstly hello to you all!

We currently have a mortgage with Santander with a fixed rate of 5.89% which is due to end beginning of November. Currently we are set to then move onto their SVR of 4.74% which obviously, would be less monthly than what we are paying now however I would like a better deal!

Here is where it becomes tricky - My financial circumstance (ie) credit rating has been hit hard over the past few months due to illness & absense from work. This has now resulted in my entering into a DMP.

This limits us as myself and my husband would be unable to go elsewhere for a better mortgage deal leaving us no optioin but to stick with Santander.

First question: Would Santander re-check our credit report in order to move us onto a better deal? We are not looking to change term etc, just hoping for a better interest rate.

Second question: They do not advertise rates for existing mortage customers but is anyone able to give us an idea of what we might be looking at?

Many thanks in advance for your help!