The Broadcasting Authority yesterday issued advice to two radio stations in relation to two complaints filed by members of the public against two programmes. The first involved RTHK radio programme Investment Era broadcast on September 22, during which a host of the financial programme featuring information on investments used an offensive expression when talking to a caller and a guest host about the economic development around Tianjin and the Bohai Rim. 'The expression uttered in the programme was a foul expression which was regarded as offensive and unacceptable for broadcast on a sound broadcasting service by an average person,' the authority said. RTHK was therefore advised to observe the Radio Code of Practice on Programme Standards, which prohibits the use of offensive expressions, the authority said. A spokeswoman for the public broadcaster said it accepted the outcome and would advise production teams to observe the requirements more closely. The second case concerned a host of Metro Radio programme Early Birds on September 24 who suggested several times to a fellow host that he could pour engine oil on the roadway when the colleague mentioned that illegal car racing occurred at night near where he lived in Pokfulam Road, and wondered aloud what he could do about it. The authority said that while the suggestion may not have been ill-intentioned, it was irresponsible for the host to repeat it several times in the programme, since doing so 'might bring serious consequences to road users'. 'The host's suggestion encouraged illegal and dangerous conduct. Nonetheless, the irresponsible suggestion was made in passing in the 21/2 hour programme,' the authority added. Metro was also advised to observe the code of practice, which requires that programmes be handled in a responsible manner.