It was a litle more complex than just the 88s stopping the British, and British tend not to acknowledge that the french, though late for the initial attack, saved the british in the latter stages of the battle.
The broad progress of the battle was as follows
During the afternoon of 21 May, the attack by the 50th Division and the 1st Tank Brigade was undetaken by a small detachment known as "Frankforce" and was progressing progressing south from Arras. This was to be the only large scale attack mounted by the BEF during the campaign. The attack was supposed to be mounted by two infantry divisions, comprising about 15,000 men. It was ultimately executed by just two infantry battalions, the 6th and 8th Battalions Durham Light Infantry supporting the 4th and 7th Royal Tank Regiment, totalling around 2,000 men, and reinforced by 74 tanks (some Matilda IIs). The infantry battalions were split into two columns for the attack. The right column initially made rapid progress, taking a number of German prisoners, but they soon ran into German infantry and SS, backed by air support, and took heavy losses.
The left column also enjoyed early success before running into opposition from the infantry units of Generalmajor Erwin Rommel's 7th Panzer Division. The defending forces—elements of motorized SS regiment "Totenkopf" (later to be expanded into SS-Division Totenkopf)—panicked after seeing their AT fire was inneffectivem nd they were overrun, their standard 37 mm (1.46 in) PaK 36/37 anti-tank guns proving ineffective against the heavily-armoured British Matilda tank. Rommel committed some of his armour to local counterattacks, only to find the guns of the Panzer II and Panzer 38(t) tanks could not penetrate the Matildas' armour. Desperate to prevent a British breakthrough, Rommel ordered the division's 88 mm (3.46 in) FlaK 18 anti-aircraft guns and 105 mm (4.1 in) field guns be formed into a defensive line and fire anti-tank and HE rounds in a last-ditch effort to stop the Matildas. The BEF's advance was halted with heavy losses. Then, with Luftwaffe support, Rommel launched a counter-attack, driving the British back. Frankforce had been repulsed.
The Germans pursued the British but were halted by French armour from the 3rd Light Mechanised Division (3rd DLM). The Somuas of the French formation saw the German forces stopped cold. French cover enabled British troops to withdraw to their former positions that night. Frankforce took around 400 German prisoners and inflicted a similar number of casualties, as well as destroying a number of tanks. Later on 23 May the 3rd DLM launched its own attack to try to exploit British success. The Luftwaffe and German reinforcements defeated the attack.
The operation had punched far beyond its weight; the attack was so fierce that 7. Panzerdivision after action reports state that it was believed it had been attacked by five infantry divisions. The attack made the German commanders nervous, and it appears to have been one of the factors for the surprise German halt on 24 May that gave the BEF the slimmest of opportunities to begin evacuation from Dunkirk.
The battle is historically credited with shaking the confidence of the German High Command (OKW). Rommel is noted to have written a report of an attack by hundreds of Allied tanks, which was likely a contributing factor to the halt of the German offensive for 24 hours (though Hermann Göring's promises that the Luftwaffe could finish off Dunkirk was also a major factor). The main British force consisted of only 58 machine gun armed Matilda Is and 16 QF 2-pounder gun armed Matilda IIs supported by a few lighter armoured vehicles. All but 1 of the tank losses were in Matilda Is I believe (according to the batallion histories at least). The delay by the OKW is one of the main reasons for the success of Operation Dynamo. For this reason, Frankforce, in spite of being repulsed, could be considered one of the few allied successes of the 1940 French campaign. In total, more than 40 British and 20 French tanks were lost in the battle, compared to roughly 12 lost by the Germans. Rommel noted in his diary that his division had lost 89 men killed, 116 wounded and 173 missing and captured.
While the British lost around 100 men killed or wounded in the attack, it is unknown how many French soldiers became casualties in the engagement,and how many casulaties they inflicted or prisoners they took. . The Germans lost 700 men, of which 400 were captured, all these were to British forces. The French successes are not included. These successes were mainly in the initial stages of the battle before the 88 mm FlaK 18s were brought about to engage the British forces.
Despite common misconception, the FlaK 18 was not used for the first time as an anti-tank gun at Arras. Several years earlier, during the Spanish Civil War, the German volunteer unit Condor Legion had used FlaK 18s against armour and other ground targets. Rommel realised the defensive power of the FlaK 18 and used it to great effect during his time commanding the Afrika Korps. Flak 18s would have been inneffective if they had not been issued with AT ammo before the battle. The Germans certainly already knew of its great AT potential, and had taken steps to exploit it.
On the British side, both Tank regiments that had participated were immediately reconstituted as Matilda II regiments.
•The 4th under their new Commanding Officer, W A O'Carroll DSO, and a new RSM Short, were re-organised and equipped at Twesledown near Aldershot before moving to East Grinstead to prepare for home defence.
•The 7th under their new Commanding Officer, R M Jerram DSO MC, Adjutant Capt (later Maj Gen) "Jock" Holden, and their existing RSM Fowler, also moved first to Twesledown. They then trained for six months in Braco, Scotland being despatched midway through that training to in August 1940 to Egypt.
.
The 7th sailed from Liverpool on 21 August 1940 for Egypt, their new Matilda Mk 2s sailing at the same time in a fast merchant ship. The small convoy, escorted from Cape Town by the appropriately named Australian cruiser "Hobart", arrived at Port Said on 24 September
battle hardened veterans now, with a superior tank, they were dangerous opponents for the Italians.....
Pictured is an image of the one of 7 RTRs Matildas being unloaded at Port Said.