Brigg (now Swaine Adeney Brigg) appears to have the largest remaining manufacturing operation in the UK with two dedicated umbrella makers, a cover maker, repair personnel among the 30 people in Swaine's Cambridgeshire factory. As mentioned in my previous post, see this interesting interview of Michael Stevens of Swaine Adeney Brigg for further details.
I find the Brigg Prince of Wales Traveller model to be a nice fusion of form and function for the erstwhile visitor to London. But two choices remain. It should be noted that James Smith will cut the umbrella or walking stick to your appropriate size and reach.