It might be ignorance on my part, but I’m clueless as to what “JWT” means.
Your solicitor is best placed to advise you of your options. No one here will know your case better than the person that knows the case well enough to have already sent a Pre-Action Letter. They can advise you on the likelihood of success, adverse costs, and alternative options (if there are any given that JR is a “last resort” remedy).