Complex sentence: They formed the letter'J' for Jubilee (also the Northern Line's moquette forms the letter' N') during November 2005 the old cars were refurbished and these seat covers were replaced with the new dark blue Tube Lines moquette.
Split into simpler sentences: They formed the letter'J' for Jubilee, as much as the Northern Line's moquette forms the letter' N'. In November 2005 the old cars were refurbished and these seat covers were replaced with the new dark blue Tube Lines moquette.