Should we fix rate with ptsb split mortgage before switch to pepper?

Ok what about 2nd point

Ive sent off updated sfs to ptsb to see what they come back with. Hoping they will let me go back to near full payment. If this is case I'm sure I'll have no issues with dealing with Pepper in future. Would i be correct. Ive never missed a payment since restructure and original had a small arrears on it so I restructured to get back on track.
 
what about 2nd point

Ive sent off updated sfs to ptsb to see what they come back with. Hoping they will let me go back to near full payment. If this is case I'm sure I'll have no issues with dealing with Pepper in future. Would i be correct. Ive never missed a payment since restructure and original had a small arrears on it so