I think you have a few options for reducing your monthly bill.
You can take both propoerties and use them as security for mortgage with any number of institutions and load more of the mortgage against the investment property than the home propery. My advice would be to load the investment property to 80% LTV and go interest only on his. Your rent will probably come close to matching the repayments. Also as Clubman says, try and let it out for the year if possible, even at slightly lower rent as it will help your cashflow. The equity you release on the investment property can be used to pay down your home mortage and thus the repayments on the home mortgage.
In addition, I would concur with Clubman about the payment protection - complete rip-off and I don't know of anyone that got a payout when they hit trouble. Will probably save you a couple of hundred a month.
I don't think you should be worried about your situation, it should be easy to sort - I'd advise speaking to an independent financial adviser to clarify your options in detail, but in broad terms, I think you'll be fine