There is no suggestion the test was anything other than random but the news comes amid growing tensions over the progress of the Australian Crime Commission's investigation into doping, match fixing and organised crime in sport. "I had the ASADA team knock on my door the first night I was in London, they got us up for a bit of a test," Slater said before training at the Harrow School for next weekend's World Club Challenge against Leeds at Headingley. "If there are people pushing the boundaries or going over those boundaries, they'll get caught out sooner or later."

Slater, teammate Ryan Hoffman and coach Craig Bellamy spoke out against the aspersions cast on all NRL players by the doping allegations.

Slater said: "It's very damaging for individuals and also the whole culture in Australian sport. No one's been found guilty of anything, it's just been speculation. Everyone's been thrown in the same boat. That's the most disappointing thing, I find, regarding the whole situation."

Bellamy added: "Most people have got the same opinion. They've come out and obviously said a few things and until it gets sorted out, everyone's tarred with the same brush.

"I think, like everyone else, I would have preferred them come out and actually name people and name teams and investigate it from there but that hasn't happened and I'm not actually sure where it all is at the moment."

Hoffman said: "I think it's quite disappointing to me as a player, and we as a code of rugby league … the government, all they've said is they're looking at people. They haven't said there's a massive problem in rugby league. Nothing's really come out from it.

"I've always been confident that we at the Melbourne Storm, we don't have a drug problem. I'm very confident in the NRL we don't have a drug problem. You might have a couple of apples that spoil the barrel but we play the game fairly and the NRL has got good integrity in that regard.

"We, as players, would have liked it to have been handled differently but it wasn't. All we can rely on is our reputations and know what we believe and I know the players I play with and what they do."

London traffic played chaos with the Storm's preparation, with their arrival in Harrow delayed for an hour for an opposed session against the London academy squad.

London Broncos coach Tony Rea and Australian imports Craig Gower, Chris Bailey and Shane Rodney looked on as a ballwork session was followed by a gruelling game of "grab" as Bellamy barked orders and GPS vests kept track of selected players.

Slater, who missed the All Stars game due a lack of match fitness caused by an off-season ankle injury, showed no signs of being restricted.

The Storm were due to shift base to Leeds at the weekend.

Bellamy and members of his staff spent Valentine's night at the West End musical The Bodyguard. "We forgot about Valentine's Day and struggled to get a table - there were balloons and flowers everywhere," Bellamy said.

Meanwhile, Leeds fullback Zak Hardaker looks to be out of the WCC after suffering a suspected broken finger in the 42-14 win over Salford at Headingley. The previous week, Hardaker was poleaxed in a shoulder charge which earned Castleford's Rangi Chase a two-match ban.

Ryan Bailey (knee) and Brett Delaney (hamstring) missed the Salford match and are also in doubt.

Twitter - @therealsteavis