Help with documentation needed for remortgage

Sheep

I have recently applied for a remortgage with the Co-operative bank. All was accepted. I have been told i need either 3 months payslips and 3 months bank statements or 3 months payslips and this years p60. My employer issue all payslips online for me to print. The only problem is that when i print them off on paper they look fake and not very good copies. Do mortgage companies accept printed off payslips? my p60 isnt due till end of May and didnt really want to have to wait that long so was going to issue 3 months bank statement too. Here is where i find myself with another little problem. I do my banking with Nationwide BS and have done for the past 5 years (which is what I told Co-op) but in March I applied for a mortgage with Natwest. Things were going well with Natwest and I switched my banking to them. The mortgage application fell through so im in the middle of switching my account back to Nationwide. Therefor if i send in 3 months bank statements then there will be 1 from NWD and 2 from Natwest. Will this make a difference to my mortgage application? should I just wait for my P60? My application was referred and had to wait 5 days for a decision so I dont want that again.

Does anyone have any idea what is best to do please?!?!?