Network Brown
Brown line is the second colour to gain a pair of Tridents in each of the two versions of Network livery. Some pictures I saw when looking for references for the buses show Solo SRs and original livery Tridents working at the same time, so if the original version of the livery lasted until the withdrawal of those brown Tridents, the new livery must have been applied only to a bus (or buses) added to network brown at a later date to increase frequencies.
Network Brown
Brown line is the second colour to gain a pair of Tridents in each of the two versions of Network livery. Some pictures I saw when looking for references for the buses show Solo SRs and original livery Tridents working at the same time, so if the original version of the livery lasted until the withdrawal of those brown Tridents, the new livery must have been applied only to a bus (or buses) added to network brown at a later date to increase frequencies.