Guys, Before any more speculation.....I was orbiting over the city at 1500 ft which was given to me by ATC. I was at 350 feet in an authorised low flying area where you can go to 100 feet with no problem. I am in New Zealand by the way - hence the 'Middle Earth'
PH, Dutch, Tony, Chilli, FNG and Dub - Thanks for your comments all. Its been worthwhile learning from your experiences.
In hindsight I should not have attempted to take off again. Yes it was definetly a nose wheel shimmy I had. My approach speed was not outrageously high - I try keeping it around 65kts. In the calm condiions another notch of flap would have been useful too as I had only 20 degrees selected.
Cheers
