William Dunlop continues to shine on Wilson Craig's 600 Honda as he again led his rivals a merry dance during practice for the Isle of Man TT on Thursday.

The 26-year-old from Ballymoney topped the times at 125.467mph and must start Monday's opening Supersport race as the favourite after dominating the middleweight class all week.

He arrived at the TT high on confidence following his maiden victory in the four-stroke class at the North West 200 after edging out Alastair Seeley to win the first Supersport race.

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In the Superbike session it was Kiwi Bruce Anstey who hit the front on his Padgetts Honda Superbike at 128.815mph from Michael Rutter on the MSS Bathams Kawasaki at 128.072mph.

Tyco Suzuki's Guy Martin was third fastest at 126.939mph.

Gary Johnson (126.458mph), Ian Hutchinson (126.251mph) and John McGuinness (125.984mph) rounded out the first six, although times were down from Wednesday's session due to the overcast conditions and some damp patches below the trees around the Mountain course.

McGuinness still boasts the fastest lap of the week so far on his Honda TT Legends machine at 130.079mph.

Dunlop's consistently fast times on his 600cc Honda have marked him out as the man to beat and on Wednesday he was some nine seconds faster than brother Michael, who already has a Supersport victory to his name following his triumph in 2009.

Michael managed a lap at 124.370mph on his Yamaha R6 to take second ahead of Anstey (123.649mph), Johnson (123.639mph) and Guy Martin - who was out on the Tyco Suzuki GSX-R600 for the first time this week - with a lap at 122.63mph.

Earlier in the evening, Dave Molyneux and Patrick Farrance topped the times with the fastest lap of the week in the Sidecar class at 113.538mph from Tim Reeves and Dan Sayle (112.218mph).

The Supersport/Lightweight session was halted for around 30 minutes following an incident at Sarah's Cottage.

The red flags were deployed to allow an ambulance to attend the scene to transport the injured competitor to Lambfell for transfer to the air ambulance.

He was later named as Stefan Holz, who was conscious with a right arm injury.

Dean Lindley/Leon Fitzpatrick had an accident at Douglas Road Corner in the Sidecar session.

Lindley escaped unhurt, but Fitzpatrick was transported by helicopter to Noble's Hospital with back pain and possible fractures.

It had looked as though the planned Superbike session would be cancelled with time at a premium following the delay, but the clerk of the course announced that Superbike, Supersport and Superstock machines would be permitted to go back out onto the circuit at 8pm.

There was no further track time for the Lightweight Supertwin machines, leaving Ian Lougher as the fastest rider at 113.023mph from James Hillier (112.952mph) and Michael Rutter on the KMR Kawasaki (112.121mph).

However, Farquhar remains the class leader following his 115mph lap on Tuesday evening.

Johnson posted the best lap in the Superstock class on his Honda Fireblade at 125.206mph from Farquhar at 124.630mph.

Former BSB rider Karl Harris took over the mantle of fastest newcomer with a lap of 119.017mph on the SMT Honda.