Been told the same as you about the ThomsonFly planes - only problem will be if the long haul planes are in the wrong place due to the strike.
We are also going on OV1 to Jamaica flying out on 8th January. I have been in contact with Ocean Village about the strile at Gatwick where we are flying from - they advise that there sg=houldn't be a probem. Is that where you are flying from.
We are flying from Gatwick. Hopefully there won't be a delay if the strike goes ahead. Depends on where the plane is coming from before we board!.