Royal Enfield Model G350 Episode: 1.03
Registration number: NOJ 88 ✔ SORN Vehicle make ROYALENFIELD Date of first registration 17 April 1953 Year of manufacture 1953 Cylinder capacity (cc) 350cc Fuel type PETROL Vehicle colour NOT STATED I think the other one used (which has been painted) isn't the same one... 1.04: 1.05: G 350 ? Link to "www.the-blueprints.com"
I agree that the bike in the main pic is a Model G 350 - https://en.wikipedia.org/wiki/Royal_Enfield If you look closely at the other bike, NOJ88 in primer, you will see that it is a later model Bullet with rear suspension, although it may be as early as 1949 but a newer design.
Yamaha Big Bear Episode: 1.04
think model is Big Bear like this http://i.ytimg.com/vi/xx4uRY_ltVs/hqdefault.jpg
Yamaha YZF-R6 Episode: 5.01