UK Scenic Train Rides Recs?

Recommendations for Scenic Train Rides in the UK?
Hi everyone! I’m from the U.S. and will be studying in London this spring. I’m on the lookout for an all-day or multi-day train ride that departs from London, or routes accessible from the city, that will take me through the picturesque countryside and along the coast. I’m not interested in a narrated tour or any trips that make excessive stops. I’m hoping to find something similar to the Amtrak Coast Starlight on the West Coast, where I can relax, enjoy the views, and read. If you have any suggestions or recommendations, I would greatly appreciate it!
That sounds like an amazing way to experience the UK countryside! Here are a few scenic train rides you might consider:
West Somerset Railway: You can start from London and take a train to Bishops Lydeard (via Taunton). The West Somerset Railway is a heritage steam railway that runs through beautiful countryside and along the coast at Minehead. It offers a charming and nostalgic experience.
The Cotswold Line: Take a train from London Paddington to Moreton-in-Marsh, and enjoy stunning views of the Cotswolds. You can sit back and relax while passing through picturesque villages, rolling hills, and beautiful landscapes.
The Great Western Railway (GWR) to Cornwall: Catch a GWR train from London Paddington to Penzance. This route takes you through lovely countryside, and as you approach Cornwall, you’ll see stunning coastal scenery. There are many opportunities to hop off and explore, but you can simply enjoy the ride.
The North Norfolk Railway: Although it requires a short train ride from London to Sheringham, you can then board the North Norfolk Railway, which takes you on a steam train ride through the picturesque Norfolk countryside and along the coast.
The West Highland Line: If you’re willing for a longer trip, you can take a train from London to Mallaig via Fort William. The West Highland Line is often cited as one of the most scenic train journeys in the world, with breathtaking views of mountains, lochs, and coastline.
The Settle-Carlisle Railway: Take a train to Settle and board the Settle-Carlisle Railway. This ride offers stunning views of the Yorkshire Dales and is known for its beautiful viaducts and rugged landscapes.
The Jacobite Steam Train: If you’re up for a mini adventure, you can take a train from London to Fort William, then hop on the Jacobite Steam Train, which takes you along the route made famous by Harry Potter, through stunning highland scenery.
Each of these options offers a scenic ride without too many stops, so you can relax and enjoy the views while you read. I hope you have a fantastic time exploring the UK!