Looking at your likes in novels I’ll go with Ann Cleeves first. The ITV have done several series with Brenda Blethyn as Vera Stanhope. The tv programme is filmed in Newcastle upon Tyne and the north east of England. Northumberland has the most castles in one county in the UK. Alnwick (pronounced Anick) Castle is the seat of the Duke and Duchess of Northumberland. The castle, the gardens and the town are good to visit. One of the Harry Potter films had some scenes filmed there. The town has a wonderful second hand bookshop based in the old railway station. Just up the coast is Lindisfarne where the gospels were written about 700 AD. It was the founding monastery of Christianity on the mainland of Britain. It was sacked by the vikings and the bones of St Cuthbert were moved to Durham cathedral. I currently live in this part of the UK. Lots to see and do with great restaurants, theatres, beautiful towns and villages.
I love Norfolk and Norwich is interesting to visit. I’ve never been to Walsingham but I’d love to spend more time exploring here. The Norfolk broads were once a huge area of salt marsh. These days you can take trips on the broads, visiting pubs etc. Although it is relatively close to London it’s rather unspoilt. Some of my ancestors come from Suffolk and I want to go back to see more.
Even though England is a small country each area has it’s own character. My personal favourite place is Brighton with the Royal Pavillion. It’s a vibrant city and close to historic places such as Hebert Castle, childhood home of Ann Boleyn, Henry V111 second wife. Sussex was my childhood home. Rye is a very pretty small town with cobbled streets and smugglers pubs. It used to be on the sea but is now inland!
The Lake District is quite distinct but can be very busy in July and August. The scenery is quite spectacular but more like Scotland in many ways. Cornwall too can be very busy in the summer too. The weather there tends to be warm and of course lots to see.
It really depends on what spikes your interest. Lots of historic houses etc. all over the British Isles. I’d love to go to the Shetlands but my choice to go there would be to the Viking festival held I think in February. You can buy a National Trust pass and/or an Historic England pass that will give you entrance to all their properties.
Bristol is a vibrant city in the south west of England. It’s wealth came from sugar, tobacco and the slave trade. They have the first iron steamship produced by Brunel in one of the harbour areas.
To be honest, the choice is endless. If you’re interested in the first iron built bridge in the world go to Ironbridge in Shropshire, lots to see there in terms of outdoor working museums. There are a number of these across the country: Ironbridge, Black Country, Beamish near Newcastle upon Tyne, Wealden Museum (Sussex) and I’m sure there are more.
Perhaps you could do some research about your particular interests and think about where your time would be best spent. It’s so difficult to advise but I’m sure others will have many other suggestions to offer.
Good luck with your travels. It sounds so exciting.