A shelly oolitic limestone from Ancaster in Lincolnshire. Many forms of this have a distinctive 'streaky bacon' appearance – see Lloyds Banks and NatWest bank examples below.
Local examples (click to enlarge)
Lloyds Bank in High Street - brick and Ancaster stone
NatWest Bank in The Parade - primarily Kentish ragstone and Ancaster stone
Statue of St Thomas on Roman Catholic church in Burgate
Lloyds Bank detail - note the streaky bacon look
NatWest Bank detail - note the streaky bacon look