German guns firing on UK from mainland?

In WW1, Germany was firing on Paris with 3 Krupp Cannons from up to 120 km away. The shell took 3.5 min for the journey.

Were such units available in WW2? (I would expect the ones from WW1 were demolished post-war...)

It is about 150 km from Calais to London, many targets would be in range for such guns, si?

Why were they not used?

TIA

Cheers and all,

Yes, the Germans had lots of long range railway guns.

No, not if they only had a maximum range of 120km. There really isn't very much of military importance in Kent worth expending hideously expensive long range artillery barrel linings on, apart from the Channel Ports.

Why bother when you have the Luftwaffe? Most of the Germans heavy artillery was more usefully employed in sieges such as Sevastopol. The German coastal artillery emplaced at Calais did engage with rather pointless long range duels with their opposite numbers at Dover from time to time.

Cheers

By September 1940 several German batteries had been established on the French coast facing Dover. They were:

Siegfried battery of 4x38cm (14.9' guns south of Gris-Nez Friederich-August battery of 3x30.5cm (12' guns north of Boulogne Grosser Kurfurst battery of 4x28cm guns (11' guns at Gris-Nez Prinz Heinrich battery of 2x28cm guns (11' near Calais M1, M2, M3 & M4 batteries between Calais and Gris Nez with 14 17cm guns (6.7'.

There were also no less than 42 heavy and medium field artillery batteries (7 captured from the French Army) covering the Straits, although unable to reach the English shore.

The targets of the heavy guns were mainly Dover itself and its port and defences.

Except for Thomas Pynchon's novel _Gravity's Rainbow_.

No, it's not a slapstick cinematic tour-de-farce, but it is a black comedy in the vein of Heller's _Catch-22_. V-2s figure heavily in Pynchon's novel (the title refers to their ballistic arc), as the protagonist Slothrop gets an erection whenever a V-2 is about to strike London.