How strict is LTV on mortgage deals?

Hi,

I plan to move my residential mortgage to buy to let when my current deal expires in the next couple of months. There is a good rate available with my current lender up to 75% loan to value. When my current deal expires my loan to value will be 75.377%. Am I likely to qualify for it or will the 0.377% mean I can't get it?

I could pay the difference but I think I'd actually be cheaper to go onto the SVR for a couple months and delay my tenants moving in.

Does anyone know how strict the ltv ratio is normally?

Thanks