Question: Of the night only London bus routes that end at Oxford Circus , which is operated by a subsidiary of SeaLink Travel Group ?

text: List of bus routes in London
List of routes -- Night only routes ( N-prefixed )
Main article : Night buses in London Night bus routes are often related to the day numerical equivalent , normally running the same route but with an extension at either end of the service . This is normally to provide a night service to destinations served by tube or train during the day . [ 18 ] However , there are a few N-prefixed route numbers that have no relation to their daytime equivalents : the N5 , N20 , and N97 all operate in a different part of London to their respective day routes , and the N550 and N551 ( which provide night service on parts of the DLR network ) have no corresponding daytime routes . [ 18 ] There are also 24-hour routes , which run day and night but usually with a lower frequency during the night hours . The vast majority run the same route at all times . With the introduction of the Night Tube , some day routes have been extended to run during Friday and Saturday nights to serve the stations .
This is a list of Transport for London (TfL) contracted bus routes in London, England, as well as commercial services that enter the Greater London area (except coaches). Bus services in London are operated by Abellio London, Arriva London, HCT Group, Go-Ahead London (Blue Triangle, Docklands Buses, London Central, and London General), Metroline, RATP Group (London Sovereign, London United, and Quality Line) Stagecoach London (East London, Selkent, and Thameside), Sullivan Buses, Tower Transit, and Uno. TfL-sponsored operators run more than 500 services. Non-TfL-sponsored operators including Arriva Shires & Essex, Arriva Southern Counties, Cardinal Buses, Carousel Buses, Go-Coach, First Berkshire & The Thames Valley, Hallmark Connections, Metrobus, Red Rose Travel, Southdown PSV, Stagecoach South, Trustybus, and Uno operate services between parts of Buckinghamshire, Essex, Hertfordshire, Berkshire, Kent, Surrey, and Sussex on the one hand and London on the other, with one local council-sponsored service each in the boroughs of Bexley, Barking & Dagenham, and Hackney (extending into Islington).
Route Start End Operator
N1 Thamesmead Tottenham Court Road station London General
N2 Crystal Palace Marylebone station Arriva London
N3 Bromley North Oxford Circus Abellio London
N5 Edgware Trafalgar Square Metroline
N7 Northolt Oxford Circus Metroline
N8 Hainault Oxford Circus Stagecoach London
N9 Heathrow Terminal 5 Aldwych London United
N11 Ealing Broadway Liverpool Street bus station London General
N15 Romford Oxford Circus Blue Triangle
N16 Edgware Victoria bus station Metroline
N18 Harrow Weald Trafalgar Square London United
N19 Clapham Junction Finsbury Park bus station Arriva London
N20 Barnet Trafalgar Square Metroline
N21 Bexleyheath Trafalgar Square London Central
N22 Fulwell Oxford Circus London General
N25 Ilford Oxford Circus Tower Transit
N26 Chingford Trafalgar Square HCT Group
N27 Hammersmith Chalk Farm Abellio London
N28 Camden Town Wandsworth Tower Transit
N29 Enfield Town Trafalgar Square Arriva London