When the electrified system opened it needed some new tramcars to replace the horse drawn ones. The first trams used on the system were built by G F Milnes & Co., Birkenhead. They had open upper deck had back-to-back "knifeboard" seats so that they could fit under Bargate arch. No.2 was changed into a ""toastrack"" car in 1916. It was sold to Portsmouth in 1919 where it became Number 104. In 1903 twelve trams were built by Hurst, Nelson & Co. The trams originally had three windows on each side on the bottom deck. This was later chnged to have four windows on each side because the original design did not give enough support for the top deck. Two bogie trams were ordered in 1910. This order was later cancelled. The system also bought six ex-London County Council Tramways cars with enclosed upper decks. These were numbered 75-80. A final sixteen trams were bought in 1918. As well as these, a number of trams were built by the tramway: