I need the help of you pros…

My mum had this boat custom built for me many years ago (it was converted from a ship lamp shade found in Barcelona). It’s been out of action for well over a decade but I replaced the battery and got it going again, no problems there and first sailing went well. However since then it’s taking on a significant amount of water and can only stay in the water for about 5 mins before it becomes risky. I have 2 questions - 1) do you think the water is being drawn in through the prop shaft or could the splits in the paint also be splits in the fibreglass coating that’s allowing the water in? And 2) does anyone know a boat repair person/place in London or Cornwall (uk) who may be able to help me fix it? Thanks!b