Real estate services in this class; real estate agencies and brokers; real estate appraisals and valuations; real estate management; rent collection; renting of apartments; renting of flats; renting of houses; rental of offices (real estate); rental of real estate; housing agents; leasing of real estate; real estate evaluation; real estate listing services; consultation services relating to real estate; property leasing (real estate property only); leasing of buildings; leasing of office space; tenant management services; property sales services relating to real estate development; provision of information in relation to real estate; real estate investment services; real estate services relating to property development; real estate agency and broker services provided across computer networks; on-line computer services being the providing of real estate information and real estate listing services by means of a computerised network