The Escher vault is named for early 20th century Dutch surrealist M.C. Escher, whose artwork often featured mathematically-inspired optical illusions (such as a ring of four staircases, all connected, but all leading downwards). The vault is a 21st-century special effects version of many of the same concepts.
The H.G. Wells Lived Here 'blue plaque' is fictional. In 1898 Wells was living in Sandgate, on the Kent coast. He moved back to London in 1909.
The ringtone that plays on Pete's phone is "C is for Cookie."
The date shown on HG Wells' card in the Escher vault is August 13th, 1946. That is the date reported as Wells' death, but would seem to be the date on which Wells was bronzed.
Wells and MacPherson need the anti-matter to power the Interceptor Vest. Assuming the vest needs an electric current, the anti-matter is not sufficient. In a nuclear power plant, fission in the fuel rods generates heat, which boils water to run steam engines, which turn a bank of generators to make electricity. An anti-matter power plant would need a way to convert the raw forces of atomic annihilation into controlled current.