The British between April and Sept 1940 Built 306 Cruiser Tanks and 338 Infantry Tanks (Matilda II) along with 78 light tanks - that is significantly more than what they took to France by May 1940 (not including useless light tanks and tankettes)
Between May - Sept they built 294 x 25 pounders and 800 odd 2 pounders - with most of those going to the tanks - but that still leaves about 150 guns for the Infantry
(Above according to Hyperwar)
And not everything went to France and some of what did came back!
So the above is in addition too what the army had in May 1940
This link goes into depth what the British had in the months following Dunkirk
What is interesting is that by June 1940 Bren gun production was @ just under 3500 guns a month - enough for the full establishment of 3 Divisional slices per month
So while artillery numbers remained low for the year - that was still a lot of guns
And given that any German invading force would have between zero and no tanks and very little artillery in the first (and very likely only) week.