Bike choice £1000 Coast to coast ride in the UK.
Been riding a Ridgeback Voyage but too heavy.
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Sign up to join this communityBike choice £1000 Coast to coast ride in the UK.
Been riding a Ridgeback Voyage but too heavy.
I am not from the UK, but the acronym appears to refer to the Coast to Coast walk or ride event. (NB: please do be more specific on acronyms, as not everyone may be familiar with them, and you aren't guaranteed that someone is going to be willing and able to Google them.) One version of the ride appears to cover 137 miles, or 220.5 km, in 3 days.
Another thing to note about this forum is that we aren't a traditional free-form discussion forum. For one, as the FAQ says, questions seeking specific product recommendations are considered off topic for the reasons Daniel stated in a comment.
I feel that it is possible to answer the question in very general terms without naming specific products. I would normally suggest not a mountain bike, if possible. You could certainly complete the ride, but the knobby tires and suspension would consume some energy you don't need to spend - you could ameliorate this by changing to slicks and locking out the suspension if able.
The answer is complicated by the fact that you already appear to have a touring bicycle. If Google is a good guide, you have a steel touring bike whose MSRP was about £1k. This is the type of bike I would have recommended if you were starting from scratch and you wanted to do a lot of this type of riding. The current model year appears to have triple chainrings and provisions for rack mounts. You indicated that this is too heavy. Unfortunately, I have a feeling that you aren't likely to do much better for the price range you indicated. I don't know how much elevation gain you face, but for the most part, changing to a lighter bike doesn't make much of a difference in performance, unless you're going up an extended and steep climb and/or you drop 5 lbs or more from the bike. Also, a lighter road frame will severely limit your ability to carry luggage.
Without meaning to gaslight you about the bike feeling too heavy, do be aware that you can use that smallest ring to get up steep hills. If you can't shift because the derailer is out of adjustment, a bike store will be able to help you get it in adjustment, and they can refresh you on how to change gears.