Actually hand written applications are not accepted at the NY Consulate. I have no idea why but it says so on ukvisas.
So there are three options. Apply by post using the same form but typed responses, not handwritten. Send typed application via visa-courier service. Apply online, print off the application once it is completed and take that print out in person once an appointment has been made. If you apply on line you HAVE to take the printed out online application to the appointment, I remember it saying something to that effect when I had made my online application. And unfortunately, with NY consulate, an online application has to be made before you can even make an appointment; appointments are also only booked online. Not sure why they changed the process, but it was changed in mid-February.