In Quranic studies, there are two books that i really like. Approaching the Qur'an: The Early Revelations by Michael Anthony Sells & Coherence in the Qur'an by Mustansir Mir. First one explains poetic rythem of early revelations & their general effect on society . The second one discusses concept of Coherence in Quran. Surahs being divided into seven groups of pairs, & the connection of each surah with the next . The concept originates from Amin Ahsan Islahi's (1904–1997) Tadabbur-e-Quran, which in turn based upon the works of Hamiduddin Farahi (1863-1930).
A very detailed Tafsir by late Grand Mufti of Pakistan, Mufti Shafi Usmani is available here .
English Quran Translation & Tafsir/Explanation of The Holy Quran/Qoran/Koran - Online Free e-book Download
For Sirah, I havent seen anything better than Hamza Yusuf's lectures on Martin Lings' book. Detailed & interesting at the same time. Well anything by Hamza Yusuf is always beautiful.
Coming to the domains of Interpretation, I really doubt you are gonna find such books in UK. After all how many people are interested in knowing why this particular scholar gives preference to this particular tradition by this particular person over that tradition by that person . Thats why people look at you like that. Because only people who are doing a
Takhussus/Masters in
Usul of Tafsir or Hadith read these books .
Beyond that lies the domain of Sufism. I dont know if you are interested or not. Lings, William Chittick , Carl Ernst & Annemarie Schimmel have written nice introductions. Michael Sells has written a very nice introduction by the name Early Islamic Mysticism . He includes lots of "no where to be found" translation of Bayazid, Junaid, Rabia etc. Muraqaba by Shamsuddin Azeemi describes The place of man in God's universe, theory & practice of Sufi meditation. Pir Vilayat Khan (Son of Inayat Khan) has written a few books on "awakening" of heart. Hamza Yusuf's lectures on two books by West African Sufis are also very nice.
Before the advent of "Jack & Jill went up the hill", kids in South Asia used to read Gulistan & Bostan by Saadi, Hadiqatul Haqaiq by Sanai & Masnavi by Rumi .You can find partial or complete translation on these sites
Texts of Islam
Saadi - Boostan
Saadi - Golestan
Anything by Ghazali, specially Ahya ul Ulum ud-Din
Revival of Religous Sciences
Anything by Abdul Qadir Jilani
Welcome to the Sheikh Abd al Qadir Jilani Home Page
Ibn Arabi
Muhyiddin Ibn 'Arabi 1165AD - 1240AD and the Ibn 'Arabi Society & Shah waliullah Dehlvi
Shah Wali Allah (Qutb al-Din Ahmad al-Rahim) (1703-62) if you are into Metaphysics
Hussain Nasr for philosophy
Biography / Dr. Seyyed Hossein Nasr