Combining Sentences

Often the information in two or more sentences can be combined into one tight sentence.

*An unexpected problem with the Channel Tunnel is stowaways. The stowaways are mostly illegal immigrants. They are trying to smuggle themselves into England. They cling to train roofs and undercarriages.

An unexpected problem with the Channel Tunnel is stowaways, mostly illegal immigrants who are trying to smuggle themselves into England by clinging to train roofs and undercarriages.