"Hi, ho, hi, ho, it's off to work we go" could be heard booming out of the Odsal PA system as the Broncos took to the field.

We were being treated to the latest instalment in a line of cheeky music clips to be played to accompany the arrival of fresh victims to the Bradford fortress.

Unfortunately, the fine line between pre-match entertainment and arrogance may well have been crossed last night, as the churlish greeting was thrown back in the face of the Bulls at their spiritual home.

The 'Dwarves' from the south proved to be anything but as they set about their task of causing an upset on one of their frequent trips up the M1.

If anything, it was the hosts who were Sleepy and Dopey, leaving their coach anything but Happy and the fans Grumpy.

Even the Doc was called into play on the Bradford side, as Paul Deacon needed help off the field and a handful of head staples after taking a nasty knock to the bonce in a collision with Jim Dymock's knee.

Before the game, the mirror, mirror on the Bulls dressing room wall had told them that they were the best team of all, and they may well have bought into that too much as they were brought down to earth by a solid and hard-working, if unspectacular, London side.

With brilliant sunshine, all but a dozen of the 10,000 crowd supporting the home team, and 13 straight wins under their belts, the stage was set for yet another Bulls' rampage.

But a combination of complacency, an indecent number of errors and far too many players having a far too ordinary an afternoon, ensured that it was going to be London's day and Leeds could keep their place atop Super League.

And the home fans, clearly used to regular victories, were disappointingly quick to turn on their team, offering them little encouragement and leaving the stadium in droves well before the hooter.

But, they would argue, they did have plenty of justification as the Challenge Cup holders put on a very 'un-Bradford' display.

It was like the opening rounds of the season but without the forceful second-half comebacks.

Bradford looked flat, tired, uninspired and disinterested - perhaps a reaction to the mental energy required to beat the previously unbeaten Leeds last week.

From the off, it was clear that they were going to struggle.

After just four minutes Dennis Moran, who had only arrived in the north at noon after flying home to Australia for his uncle's funeral, opened the scoring.

He was first to an angled grubber from Chris Thorman and cleverly darted past the statuesque defence to open his account.

The score was greeted with an eerie silence that resembled a behind-closed-doors fixture - probably a regular occurrence for the southern outpost side.

And even before the effervescent Moran put in Mat Toshack for a second, the Broncos had already spurned other efforts with Francis Stephenson knocking on with only the try-line to beat and Moran having an effort ruled out for offside.

The Bulls were bucked by a Broncos side who clearly were relishing a chance to claim another big scalp and be the first team to win at Odsal since the Homecoming.

Bradford then had another lucky escape when Thorman's kick was charged down by Shontayne Hape only for Tony Martin to pick up the rebound and break.

He was stopped, but there was still a Thorman 40/20 and a disallowed Steele Retchless try (again for offside) to come as the Broncos turned the screw.

With just over half-an-hour gone, and the natives getting restless on the terraces, the superb Jamie Peacock put over Scott Naylor on the Bulls' fifth consecutive set to open the home account and draw the scores back to 10-6.

On-loan Tommy Gallagher, no doubt much to the pleasure of his Leeds' team-mates, then broke and off-loaded to Moran to go in under the posts.

A nice prop move, Rob Parker to Paul Anderson and back again, got the Bulls instant revenge in the first set after Hape had stolen the ball back from kick off, but it was still 16-12 at the break.

Although Anderson, Peacock and skipper Robbie Paul were proving their worth, too many players were suffering off-days for the Bulls.

The two wingers, in particular, looked shadows of their former selves and Bradford singularly failed to break down a steadfast London defence throughout the long and sweltering afternoon.

The loss of Deacon in the 44th minute did nothing to improve the ever-more-agitated mood of the home support.

Fortunately, the scrum-half escaped a nasty head-on-knee collision with just a few staples, a deep cut and a bit of headache.

And the loss of a first-choice kicker proved to be an irrelevance as the Bulls managed without conversions in the second half as they failed to rack up any points in a frustrating 40 minutes which saw London shut up shop to preserve their lead.

London did get a score, however, Vaikona dallied over how to deal with a Thorman dab over the top, and Moran was there for a hat-trick - his second in a week.

Although Bradford were to force some drop-outs, courtesy of some astute kicking from Lowes, there was very little excitement left in the game.

London were happy to hold on while the Bulls looked too tired and too dispassionate to really carry the fight.

This left Karl Pratt and Thorman to provide the remaining entertainment.

Something had been simmering between the two for about ten minutes before it exploded into the trading of blows in the 68th minute while waiting for a drop-out.

The official quite rightly sin-binned them both, although Pratt could have made things much worse for himself by chasing his opponent down the touchline and trying to resume hostilities in front of the benches.

The situation was eased with Bulls coach Brian Noble later dismissing it is "much ado about nothing" and suggested that they were just discussing "which one's better, MacDonalds or Burger King".

His post-match mood was surprisingly cheery considering his Super League giants had been beaten by the Dwarves of London.

He admitted there were lessons to be learnt and the side would benefit from this defeat.

Perhaps the result will also teach the organisers of the pre-match entertainment at Odsal to be a little more Bashful.