Few people may realise it, but it is a very lucky thing that the singles in Grandsire Triples are exactly the same as the singles in Grandsire Doubles. The singles perform entirely different tasks in both methods. In Grandsire Doubles, only half of the 120 changes can be attained by bobs alone. The singles make it possible to ring the other half of the 120. Grandsire Triples does not suffer from this problem, but you still cannot get all 5040 changes with bobs alone. The singles can incorporate missing B-Blocks (bob courses.)

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Grandsire Triples can use the same singles as in Grandsire Doubles because the B-Blocks are symmetrical and can be rung either 'forwards' or 'backwards.' For example, the B-Block starting with 235476 is the same as the B-Block starting with 324567. The only difference is that they are rung in opposite directions to each other. The normal Grandsire single changes the direction of the touch.

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There appear to be very few Twin-Hunt Triples methods in which the B-Blocks are symmetrical. In most of these methods the B-Blocks are asymmetrical, like the P-Blocks, and can only be rung in a foward direction. This is why these other methods require unusual In-Course singles, and can't have normal Grandsire singles in their peal compositions.

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Of the twin-hunt Triples methods, I believe that only these three have bi-directional B-Blocks: Grandsire, Union, and Tottenham Bob. 

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I first discovered Tottenham Bob Triples in 2012 while in France on a summer holiday. I was looking for other twin-hunt Triples methods with bi-directional B-Blocks and this is what I found. The B-Blocks for Tottenham are only two leads long - even shorter than for Grandsire. Because of this, it could be possible to come up with a peal based on P-Blocks and in-course singles in which there are no consecutive calls, as it is impossible to have more than two calls in a row without falseness, except in the case of singled in B-Blocks. Such a peal would be highly unusual. Another possibility (that I personally don't approve of) would be a bobs-only 5012, using all but one of the B-Blocks. Again, this touch would have no consecutive calls at all.

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In Easter 2013 some of us decided to name this method, and I started to put together some compositions. We used the code name 'Method 26' as this was the method number in Eddie Martin's twin-hunt Triples book. Because of the method's tiny B-Blocks it was very difficult to come up with peal compositions. I tried a 12-part (with the same part ends as Parker's), a 20-part, a ten-part, possibly a five-part, a six-part with half in-corse, half out-of-course part ends. Eventually I managed to successfully produce an in-course six-part. The linkage points to 'teleport' from one half peal to the other half peal are very close together, thanks to the way the B-Blocks work, as can be seen in the composition.

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It was very satisfying to have named this method, being one of the only twin-hunt Triples methods in which normal Grandsire singles can be used easily in a peal composition. Indeed, it was the last new twin-hunt Triples method with this feature. That this was rung as recently as 2013 goes to show what a neglected field twin-hunt Triples is.

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And where did the name Tottenham come from? This method is an extension of a Plain Minor method from the 18th century notebook belonging to Benjamin Annable. It is, therefore, very old. Due to various rule changes in 1969, it is not mandatory to use an old name for an antique method that hasn't been 'officially' rung. Tottenham Bob Minor had not been 'officially' rung prior to 1969 because a true 720 for that method is not possible, and it was only after '69 that such methods were allowed to be named in 1440s, or other true multi-extent blocks. But the antique name for these methods was not mandatory. However, Ben Waller of Hampshire has been doing sterling work to get the old Annable methods rung to their original names. Tottenham Bob Minor was one such method, which he and his band 'officially' named at Thruxton, Hants, in January 2013. This was peculiar, considering that I had been looking at the Triples method prior to this in 2012. Luckily, they managed to name the method before we did, and so our peal was an extension, requiring the same antique name that Annable himself had used.