Overall, great volume and if you a TTing a half marathon in 82 minutes you are in great shape. My advice would be to try and train on similar terrain to the course, and get in similar amount of vertical. Otherwise have some long runs that go to 25-30 miles now and then, but at a very easy pace taking walking breaks etc. to get you in the mindset of a long slow ultra.
But I think you could easily do a 50 miler this year once races open up in the UK.
The big difference that was hard for me to get used to was the fact you are not racing, just pushing yourself hard. With a competitive marathon you are worrying about 10 secnds here, 30 seconds there; keeping a constant pace within a few seconds/mile; and everything builds up and up to what becomes seemingly overbearingly hard finish before you pop over the line. With a 50 mile race, you are going to start out at soemthign much more akin to your easy training pace, and the slightest chance you can get to walk up a hill you take advantage of. The difficulty goes up and down, so does emotions, and the state of your stomach. You might seem to be in a horrible situation mile 37 but end up sprint to the line at mile 50. Sometimes you will end up walking for no other reason than you are friggin' tired, which is odd when you come from marathon racing.
The overall biggest difference is that a few gels and cups or sports drinks wont suffice. You will need to keep consuming calories and keep hydrating. It is hard to know what it is like after 5 hours of eating gels and dried fruit. This is hard to train for, and would be the main reason for some longer LRs, where the time on your feet is not much for the physical training but getting used to nutrition and hydration strategies
But I think you could easily do a 50 miler this year once races open up in the UK.
The big difference that was hard for me to get used to was the fact you are not racing, just pushing yourself hard. With a competitive marathon you are worrying about 10 secnds here, 30 seconds there; keeping a constant pace within a few seconds/mile; and everything builds up and up to what becomes seemingly overbearingly hard finish before you pop over the line. With a 50 mile race, you are going to start out at soemthign much more akin to your easy training pace, and the slightest chance you can get to walk up a hill you take advantage of. The difficulty goes up and down, so does emotions, and the state of your stomach. You might seem to be in a horrible situation mile 37 but end up sprint to the line at mile 50. Sometimes you will end up walking for no other reason than you are friggin' tired, which is odd when you come from marathon racing.
The overall biggest difference is that a few gels and cups or sports drinks wont suffice. You will need to keep consuming calories and keep hydrating. It is hard to know what it is like after 5 hours of eating gels and dried fruit. This is hard to train for, and would be the main reason for some longer LRs, where the time on your feet is not much for the physical training but getting used to nutrition and hydration strategies