Tarmac Group first listed on the Birmingham Stock Exchange in 1913 and then the London Stock Exchange in 1922. During the 1920s and ‘30s Tarmac had to cope with national strikes, recession and periods of intense competition. Nevertheless, the company gradually expanded its geographic coverage (particularly in the south east), increased its production of paving slabs and moved into road surfacing as well as supply. As with so many companies in the construction industry, the Second World War increased the demand for Tarmac’s services, notably for surfacing the large numbers of airfields being built or modernised. By the time of its half
Cetacean surfacing behaviour present, particularly when they do not adhere to the regulations about approach. As an increase in SABs is beneficial to the whale watching tours’ participants, the tours may be encouraged to approach cetaceans closer than recommended by guidelines. There is a lack of understanding about the long-term effects of whale-watching on the behaviour of cetaceans, but it is theorised that it may cause avoidance of popular sites, or a decrease in the energy budget for individuals involved. Cetacean surfacing behaviour Cetacean surfacing behaviour or breaching is a group of behaviours demonstrated by the Cetacea infraorder when they come to the