Sorry to see this, always sad to see a beautiful and cherished car being destroyed.
Let’s hope getting it sorted / insurance is painless.
A write off and replacement car might get you back in the drivers seat more quickly, but the numbers may not end up in your favour.
At least you are ok and no one was injured.
Very sorry to see this, you must be shocked….a quick calc says around 7-9k in parts alone, unless you go used and cut and weld, not sure what the rules in the UK are re this but in both cases (write off or cheap repair) you’ll be worse off unfortunately. Might be better to just bite the bullet now and look for a nice replacement. Hoping for the best though!