A favourite cycle ride

The 'Outer Circle' of Regents Park is - thus far - my favourite place to cycle in London. I chanced upon it while working in Soho and once found, it became the highlight of my daily route.
The route would be as follows:
Upper Holloway (home)
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zoom down the Holloway Road bus lane
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get into the right-hand lane after passing Seven Sisters Road on your left, then, at the next traffic lights (Waitrose just ahead of you), turn right onto the road that becomes Camden Road.
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Pass City&Islington college building, cycle up a gradual hill then you're rewarded with a long downhill section of the Camden Road that takes you right into Camden. Take care to avoid buses at the line of bus stops opposite sainsburys and simply follow the one-way route left along Bayham Street.
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You need to keep in the right-hand lane and then you turn right up Pratt Street. At the traffic lights where Pratt Street meets Camden High Street, you go straight across, up Delancey Street.
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Nearly at the lovely bit. Delancey Street is a slight slope and you follow it as it curls round to meet Parkway. At the junction you follow the road to the left, then carry straight on, through traffic lights and through the park gates, until you come to a T-junction. You are now within the park and this is the delectable outer circle.
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Turn right for a nice route to Primrose Hill, Swiss Cottage, St. John's Wood... and turn left for Marylebone, Great Portland Street, Oxford Street and Soho in general.
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For Soho-purposes, you follow the outer circle - very wide, well-kept road, little traffic (and what traffic there is tends to be very well-mannered) until you reach the end of the park and you hit the very busy Marylebone Road. Wait at the traffic lights then cycle straight across and into a beaut of a little crescent - Park Crescent - where apparently Mary Poppins was filmed. At half-past the crescent you turn left onto Portland Place, which you can then follow all the way to Oxford Circus.
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All in all this route took me around 40 - 45 minutes though I'm not an incredibly fast cyclist.