Ah, finally looked at it and as everyone says, it is lovely. I even found it online, not on Rightmove, but on Prime Location, a Rightmove for more expensive houses, except that these days every agent, no matter how upmarket they are puts all their properties on Rightmove, even if they are on Prime Location as well. The number of potential house buyers starting a house search with Prime Location, is very small and those going on to it from Rightmove, probably less. At any price level they start with Rightmove.
Looking at your current agent's site, she obviously sees herself as an upmarket agent, she even uses the word 'boutique' as in 'boutique properties'. I am always suspicious of anyone who gives their business airs and graces, particularly when they are selling houses and consider themselves too boutique and upmarket to be on Rightmove.
It is a beautifully designed site, but when I typed Warkworth into the 'Search postcode/location box' the search facility told me that it had no properties for sale in Warkworth
. In fact there are quite a lot. Searching by price was more successful.
I would research which are the big Newcastle estate agents, especially those dealing with bigger properties, Knight Frank have a Newcastle office, they will charge more, but provide a better service.
You have a really remarkable house, when you said converted railways station, I was expecting quite a modest house, certainly nothing as grand as yours. Your house needs to be on Right move and it needs to be with an agent that can give it national coverage. There is someoneout there that will snap up your house, but they may not be living locally.
But, and it is a big but. The housing market is very slow at the moment. Call it the Brexit factor if you wish, but I live near Oxford and we have houses, sensible priced that have been on the market for a year, people are just not buying at present.