Time for some honest advice.
£45 is buttons, but its the amount you will have to spend to get it on the water thats the problem.
Of the 3 boards shown, one of them is seat, but not for that boat. If its even the correct doimensions you will then need the webbing mount points which are about £25, but thats not essential.
No idea what the other boards are, but they are not the floor, You cant use the boat without a wooden floor in it. I would guess you can get wood at trade, but still £50 plus time (4 or 5 hours) plus varnish/paint £10.
You are also going to need a pump, paddles, ropes add another £50. Then another £30 for valves and at least 2 pots of 2 pack glue £40.
So IF and its a big IF the boat holds air, you are on the water for£225 and thats probably £100 more than the boats worth.
More bad news, you can clearly see lots of glue sticking things back on the boat and if the glue has failed in one place it will have failed in others. There is also a significant piece of damage to the top of one of the tubes near the transom which may or may not effect the the tubes themselves.
Do your self a favour and walk away, find a boat thats in 1 piece and enjoy time on the water not in the garage.